How To Read This Draft
This is a scored framework released for public comment and founding member review. It is not yet a certification instrument. No facility has been assessed against it, and none will be until the Council exists as an incorporated nonprofit with an independent board and a seated Certification Committee (see the Governance and Independence Policy).
Thresholds in this draft are set where a well-run facility can reach them today with real effort. They are expected to tighten on the two-year revision cycle, and Section 10 lists the specific numbers we most want challenged. A standard that no facility can meet is a manifesto. A standard that every facility can meet is a directory. This draft aims between those, and we would rather be told where it lands wrong than have it politely ignored.
1. Purpose
To provide independent, audited verification that an AI compute facility operates without depleting the resources of its host region and delivers measurable, ongoing, funded benefit to that region.
Certification produces a public scorecard that enterprises may cite in voluntary sustainability reporting and that host communities may use to hold operators to account.
2. Scope
Applies to facilities at or above 500 kW of IT load hosting AI training or inference workloads, whether colocation, dedicated, or operator-owned.
Certification is granted per facility, never per company. No company-wide claim may be made on the basis of a single certified site. In colocation, the facility operator holds the certification; tenants may cite it for workloads physically located there.
3. Definitions
| Term | Definition |
|---|---|
| Facility | A single site with its own utility interconnection, cooling plant, and IT load meter. Campuses with shared plant are assessed as one facility. |
| IT load | Annual energy delivered to IT equipment, measured at the PDU or equivalent, per ISO/IEC 30134-2. |
| Host region | The county (or equivalent) containing the facility, plus any adjacent jurisdiction whose water source or distribution grid is materially affected by the facility, as defined in the assessment plan. |
| Hourly matched carbon-free energy (CFE) | Carbon-free generation matched to facility consumption within the same hour and the same grid region or bidding zone, following the EnergyTag Granular Certificate scheme or an equivalent methodology consistent with the 24/7 Carbon-Free Energy Compact. |
| Additive generation | Generation capacity that reached commercial operation no earlier than 36 months before the facility's own commercial operation date, and that was contracted by or because of the facility. Reallocation of existing supply, and unbundled certificates of any vintage, are not additive. |
| WUE | Water Usage Effectiveness, liters of water consumed per kWh of IT load, per ISO/IEC 30134-9. |
| ERF | Energy Reuse Factor, the share of facility energy exported for beneficial reuse outside the facility, per ISO/IEC 30134-6. |
| Potable water | Water drawn from a municipal drinking water system or a source meeting drinking water standards. |
| Community advisory council | A standing body with a resident majority, independently facilitated, that sets priorities for the regional fund. Defined in Section 8 and in the Certification Process and Assessor Specification. |
| Matched contribution | A defined percentage of certified compute revenue contributed by the enterprise buyer and matched by the operator, held in a restricted regional fund. Working assumption for comment: 1.0% from each party. |
| Total capital investment | The disclosed capital cost of the facility as built, including land, construction, electrical and mechanical plant, and IT equipment, plus each subsequent equipment refresh. The figure used is the one the operator has disclosed in an incentive application, a financing document, or a public announcement, whichever is highest and verifiable. |
| Cumulative burden | The environmental and health load a census tract already carries before the facility is built, measured by a recognized state or federal screening tool covering at minimum air quality, groundwater threat, and hazardous waste proximity. |
| Recognized program designer | Any firm the Council has listed as qualified to design community benefit programs. Listing does not confer any advantage in assessment. |
| Material misstatement | Any submitted claim that, if corrected, would change the facility's tier or the points awarded in any pillar by 3 or more. |
4. Scoring Model
Each pillar is scored out of 20 points, for a total of 100. Tiers are set by total score and by minimum floors in individual pillars, so a facility cannot compensate for ignoring one pillar by excelling in another.
| Tier | Total | Pillar floors |
|---|---|---|
| Entry | 40 or above | 8 or above in Water and Resource Efficiency, Siting and Local Environment, and Fiscal Accountability; 4 or above in Additive Energy; enrolled in the matched contribution mechanism (item C3) |
| Provisional | 60 or above | 8 or above in every pillar |
| Full | 80 or above | 12 or above in every pillar, and at least 2 points from the heat recovery items (R1 to R3) |
Lower tiers are not failing grades. They are published as a position on a path, and the scorecard shows where the points were lost.
Note on the floors. Siting and Local Environment and Fiscal Accountability carry floors at every tier, including Entry. A facility that keeps its neighbors awake, runs uncontrolled generators, or will not publish what its tax abatement is worth is not responsibly operated whatever its water and energy numbers say, and should not carry any certification issued by this Council.
5. Pillar One: Water and Resource Efficiency (20 points)
| Item | Requirement | Points |
|---|---|---|
| W1 | Closed-loop, non-evaporative cooling in normal operation, verified on site | 5 |
| Hybrid system with evaporative trim limited to 10 days per year, disclosed | 2 | |
| W2 | WUE per ISO/IEC 30134-9, published annually, trailing 12 months, at or below 0.10 L/kWh | 5 |
| At or below 0.30 L/kWh | 2 | |
| W3 | Zero potable water for cooling in normal operation. Emergency backup permitted if capped in the assessment plan and disclosed on the scorecard | 2 |
| W4 | Withdrawal source disclosed; projected water demand at full build-out disclosed publicly at least 90 days before the first local approval hearing; documented consultation with the local water authority; no discharge requiring an industrial pretreatment permit, with discharge records reconciled | 2 |
| R1 | Measured ERF per ISO/IEC 30134-6, trailing 12 months, at or above 0.15 | 3 |
| At or above 0.05 | 2 | |
| R2 | Committed heat reuse pathway: signed offtake or partnership agreement, funded plan, and defined delivery date within 36 months | 2 |
| Completed feasibility study naming candidate offtakers | 1 | |
| R3 | Export-ready design: liquid cooling with a heat exchanger and tie-in point installed for external reuse | 1 |
Beneficial heat reuse includes district heating, agriculture, aquaculture, industrial process heat, and municipal facilities. Reuse inside the facility's own envelope does not count.
Evidence: cooling schematics and as-built drawings; water meter data for the trailing 12 months; water withdrawal and discharge permits; water authority correspondence; heat export metering and offtake agreements; site inspection of loop integrity, makeup water metering, any evaporative equipment, and the heat export tie-in.
Note on the weighting of heat recovery. Earlier drafts of this standard gave heat recovery a full quarter of the total score. That weighting was a bet that heat reuse would become the durable differentiator once closed-loop cooling went mainstream. It may still, and the item bands are set so that a facility exporting heat is clearly rewarded. But in the public record of what host communities actually raise, heat recovery is close to absent while noise, air quality, siting, and fiscal impact are near universal. Six points reflects that evidence without abandoning the forward position, and the bands are expected to tighten as US reuse becomes achievable.
6. Pillar Two: Additive Energy (20 points)
| Item | Requirement | Points |
|---|---|---|
| E1 | Hourly matched CFE, trailing 12 months, same grid region, at or above 85% | 10 |
| At or above 70% | 7 | |
| At or above 50% | 4 | |
| Below 50%, or matched only with annual unbundled certificates | 0 | |
| E2 | At or above 50% of matched supply from additive generation | 5 |
| At or above 25% | 2 | |
| E3 | Interconnection terms and the projected load ramp schedule (contracted capacity by year to full build-out) published; projected peak demand disclosed publicly at least 90 days before the first local approval hearing; independent ratepayer impact analysis published; facility bears the full cost of dedicated transmission and distribution upgrades, with no cost shift to residential ratepayers | 4 |
| Analysis published but one of the four conditions unmet | 2 | |
| E4 | Documented participation in curtailment, demand response, or grid flexibility programs, using grid-connected load flexibility or storage rather than on-site combustion | 1 |
Evidence: power purchase agreements and their commercial operation dates; hourly consumption and generation data or granular certificates; interconnection agreement and utility filings; the ratepayer impact analysis and its author's independence statement; grid program enrollment records.
Note on the load ramp: electricity service agreements are typically proprietary, and utilities now quote four to seven years to deliver full contracted power in constrained markets. A community cannot assess a facility's impact from its phase-one number. The ramp schedule is the disclosure that matters.
Note on E4 and generators: demand response earns a point only where the flexibility comes from the load itself or from storage. Meeting a demand response call by starting diesel engines moves an emission from a power plant to a neighborhood, and is scored under item L3, not here.
Assessor note: the distinction between additive and reallocated supply is the single easiest claim to overstate. The Energy Analyst verifies commercial operation dates against interconnection queue records and utility filings, not against the operator's summary.
Context for comment: the largest and best-resourced operator in the world reports roughly 66% hourly matching globally and about 70% in North America as of 2024. The 85% band is intended to be reached by only a small number of facilities in this revision cycle.
7. Pillar Three: Siting and Local Environment (20 points)
What this pillar assesses. Where the facility is, and what a resident standing at the property line experiences: what they hear at night, what they breathe when the generators run, what the sky looks like, and what the site looks like from the road. These are the impacts residents raise first and that most facility standards score last or not at all. An elected official responsible for more than two hundred data centers described noise as the single largest community complaint in the sector.
| Item | Requirement | Points |
|---|---|---|
| S1 | The facility is not sited in a census tract in the highest quintile for air quality, groundwater threat, or hazardous waste burden under a recognized state or federal screening tool | 4 |
| Sited in such a tract, with an independent cumulative impact assessment published and mitigation agreed with the affected community before approval | 2 | |
| S2 | No siting on a contaminated or federal priority-list site without completed remediation; land conversion disclosed in acres with prior use, agricultural classification, and habitat value stated | 2 |
| L1 | Sound at the nearest residential property line, night-time (10 p.m. to 7 a.m.), no higher than pre-construction ambient plus 5 dBA and no higher than 45 dBA absolute, whichever is lower | 6 |
| No higher than ambient plus 10 dBA and no higher than 50 dBA absolute | 3 | |
| L2 | Pre-construction ambient sound survey published; monitoring at the nearest residential receptors at least quarterly, conducted by a party contracted by the local government or the community advisory council rather than by the operator; readings published within 30 days | 2 |
| L3 | All backup engines meet EPA Tier 4 emissions standards; permitted and actual run hours published annually; run hours capped in the permit by year, by day, and by time of day; backup generation is not used for demand response or economic dispatch | 4 |
| Tier 4 and published run hours, but non-emergency use is not prohibited | 2 | |
| L4 | Full-cutoff, dark-sky compliant exterior lighting; no measurable light trespass at the residential property line; photometric plan published | 1 |
| L5 | Buffers as built at or above the greater of the local requirement or 100 feet at residential and public road boundaries; cooling plant, generators, and electrical equipment enclosed or visually screened; landscape plan published | 1 |
Evidence: the screening tool output for the site's census tract with the assessment date; environmental site assessment and remediation records; parcel and land use records showing prior classification; the pre-construction ambient survey and every subsequent monitoring report, with the monitoring contractor's engagement letter; air permits and engine tier certifications; generator run-hour logs reconciled against permit limits; the photometric plan and a night-time site inspection; as-built site plans and a boundary walk.
Note on S1. One state's analysis found that more than eight in ten of its data centers sit in areas already carrying poor air quality, and roughly eight in ten in the top quintile for hazardous waste burden. A standard that scores only what a facility emits, and never where it chose to emit it, would certify the concentration of burden it exists to prevent. Item S1 does not forbid siting in a burdened community; it requires that the choice be examined in public and mitigated with the people who live there.
Note on generators. The scale of permitted backup generation is now a public health question in its own right rather than a technicality: one state has permitted enough data center backup capacity to serve several times its own housing stock. Engines must be run periodically to remain reliable, so even a facility that never suffers an outage produces emissions from testing alone, and at campus scale those testing hours approach the output of a small power plant. Item L3 therefore scores the cap and the prohibition, not only the equipment.
Note on L1. The limit is expressed against pre-construction ambient because a rural night is quiet, and an absolute limit alone would let a facility raise a 30 dBA night to 50 dBA and call it compliance. The absolute ceiling is there because an already-noisy parcel should not license an unlimited addition. A facility is measured against whichever of the two is stricter.
8. Pillar Four: Fiscal Accountability (20 points)
What this pillar assesses. Whether the public can see what the facility costs the public, and whether the promises made to the community are backed by anything. Roughly thirty-five states exempt data center equipment from sales and use tax; one state forwent an estimated $1.6 billion in a single year; another state's audit found a net fiscal loss of $433 million. A facility can hold a thirty-year abatement, publish nothing about its value, and still describe itself as an economic benefit. This pillar makes the arithmetic public and requires the commitments to be secured.
| Item | Requirement | Points |
|---|---|---|
| F1 | All tax abatements, exemptions, payment-in-lieu-of-taxes arrangements, and incentive agreements with any level of government published in full, with no nondisclosure agreement covering any term | 5 |
| F2 | Independent fiscal impact analysis published before the first local approval: projected revenue to each taxing body, set against the value of abatements and exemptions and the public cost of infrastructure the facility requires, over the full term of any abatement | 5 |
| Analysis published but not independently prepared, or not covering the full abatement term | 2 | |
| F3 | Community fund contributions secured by letter of credit, escrow, or parent-company guarantee sized to at least two years of committed payments, with the instrument disclosed | 5 |
| Secured at less than two years of payments, or by a special-purpose entity without a parent guarantee | 2 | |
| F4 | Emergency services: training for local first responders on the facility's electrical, battery, and fire systems provided at no cost, and cost recovery for incident response above a stated threshold, agreed in writing with the responding authority | 3 |
| F5 | Construction and operational traffic study published; agreed road improvements and haul routes funded by the facility | 2 |
Evidence: executed abatement, exemption, and PILOT agreements; the fiscal impact analysis and its author's independence statement; the security instrument and its issuing bank or guarantor; the emergency services agreement and the responding authority's acknowledgment; the traffic study and the road improvement agreement.
Note on F3. A community benefit agreement is a promise to pay for twenty-five years, and it is usually made by a project company created for the purpose. Lancaster, Pennsylvania secured its contributions with a letter of credit, and independent analysts have argued that letters of credit, escrow reserves, or parent-company guarantees should be a universal condition. An unsecured promise from a special-purpose entity is worth what the entity is worth on the day it is called.
Note on F1 and NDAs. This item follows Microsoft's 2026 decision to end nondisclosure agreements with local governments and the emerging consensus that subsidy arrangements must be public. It sits in this pillar rather than the community pillar because secrecy about money is a fiscal failure before it is a relationship failure.
9. Pillar Five: Verified Community Benefit (20 points)
What this pillar assesses. Whether a facility's commitments to its host community are real, funded, proportionate, governed by residents, and kept. Where a community benefit agreement, host community agreement, or community benefit plan exists, this pillar does not judge how it was negotiated; it verifies that it is being carried out: contributions received on the agreed schedule, decisions made by the body the agreement names, results reported in public, and every commitment traceable to a published record. The Council does not draft or negotiate agreements. It is the independent check that the agreement is being honored, which is the function most agreements lack.
| Item | Requirement | Points |
|---|---|---|
| C1 | Standing community advisory council with a resident majority, facilitated by an independent facilitator contracted by the Council, not by the operator or any program designer, with member stipends and a paid coordinator funded from the fund so that participation does not depend on a resident's ability to volunteer | 3 |
| C2 | Participatory needs assessment conducted with the community, following the Council's published needs assessment methodology | 2 |
| C3 | Enrolled in the matched contribution mechanism under a signed fund agreement, with the operator's matching share committed for all certified revenue, and with equipment refresh treated as a triggering event so that reinvestment in servers, chips, and electrical plant is captured on the same basis as the original build | 4 |
| C4 | Total committed community contributions over the term of the agreement, including refresh triggers, at or above 2.0% of total disclosed capital investment | 4 |
| At or above 1.0% | 2 | |
| Below 1.0%, or capital investment not disclosed | 0 | |
| C5 | Quarterly public impact reporting showing funds received, funds distributed, outcomes against council priorities, and performance against every commitment in any executed agreement, with the agreement itself published | 3 |
| C6 | Local hiring and contracting commitments with measured, published results, and a workforce training commitment using registered apprenticeships or an equivalent credentialed pathway | 2 |
| C7 | Digital access: the needs assessment evaluates broadband availability and affordability in the host region; where a gap exists, the fund rules name digital access as an eligible priority and the facility's fiber route is assessed for public middle-mile use, with results published | 1 |
| C8 | Electronic waste: a lifecycle plan covering each equipment refresh, with the reuse, refurbishment, and recycling chain documented and published, and destination facilities named | 1 |
Note on C4, proportionality. This is the item that decides whether the rest of the pillar means anything. A twenty billion dollar campus contributing fifty thousand dollars a year would, without it, score exactly what one contributing two million scores. The measure is expressed against capital investment rather than revenue because facility-level revenue is not observable from outside, while capital investment appears in filings, financings, and the incentive applications item F1 requires to be published. The 2.0% and 1.0% bands are the least tested numbers in this draft and are specifically put out for comment. For reference, the most complete publicly posted data center agreement commits roughly one to two percent of estimated capital investment over its term, and an experienced practitioner has publicly described its finances as not strong for a project of that size.
Note on C8. Item C3 treats equipment refresh as a contribution trigger, which is an acknowledgment that servers, chips, and electrical plant turn over every three to seven years at very large scale. A standard that captures the money from that cycle and says nothing about where the hardware goes would be incoherent.
Explicitly insufficient: one-time philanthropy scores zero. A scholarship or a fire department donation is welcome and irrelevant to this pillar. Emergency services support is scored under item F4 as an obligation, not here as a benefit.
Fund structure: contributions are held in a restricted fund at a community foundation or equivalent fiscal agent in the host region, under a fund agreement with the Council. The advisory council recommends distributions; the Council confirms they fall within the fund rules; the fiscal agent disburses. The Council's Community Assessor audits this pillar and has no role in facilitating the council or administering the fund.
10. Maintenance, Suspension, and Publication
- Annual re-audit, with a full reassessment every third year
- Public scorecard for every certified facility, showing points by item, tier, and the name of any recognized program designer used
- Material misstatement triggers immediate suspension, not a remediation period; the scorecard shows the suspension
- A facility that drops below its tier floor at re-audit is re-tiered, not suspended
- Complaints from residents or local officials are accepted through a public channel and may trigger an unscheduled review
- Decommissioning and continuity (condition of certification at Provisional tier and above): the operator files a decommissioning and site restoration plan with a bond or equivalent financial assurance proportional to the project's capital value rather than a nominal figure, and the fund agreement provides for committed contributions to continue through closure and for the fund's remaining balance to stay in the host region under the advisory council's direction. A facility without a filed plan is capped at Entry tier.
- Permanence of the record: every scorecard, every quarterly fund statement, and every assessment summary remains published after a facility is re-tiered, suspended, sold, or decommissioned. The record belongs to the host region, not to the operator or to the Council's contract with it, and it is never removed at an operator's request.
11. Open Questions for Comment
These are the numbers and definitions we expect to be challenged, and want to be.
- Is 85% hourly matched CFE the right Full-tier band for this revision cycle, given current North American performance?
- Is 36 months the right window for additivity, and should the definition require that the facility's load was named in the generation project's financing?
- Is ERF 0.15 reachable in the US within three years by any facility not adjacent to a district heating network? If not, is export readiness (H3) rewarded enough?
- Is a resident majority the right composition for the advisory council in regions where the facility is the dominant employer?
- Is 1.0% from each party the right matched contribution level? What level makes an enterprise decline to enroll?
- Should colocation tenants be able to earn a tenant-level citation, and on what basis?
- Is the 500 kW scope floor correct, or should it follow the EU's delegated regulation threshold exactly?
- Should decommissioning be a scored item rather than a condition of certification, and what form of financial assurance is realistic for a facility whose operating life is uncertain?
- Should replenishment or watershed restoration outside the host region earn any credit in Pillar One, or does crediting it repeat the substitution problem that Pillar Two rejects for unbundled certificates?
- Is 45 dBA at night, referenced to pre-construction ambient plus 5, the right band for item L1 in a rural setting, and is it the right test in an already-industrial one?
- Item C4 asks whether committed community contributions reach 2.0% of total capital investment, with a lower band at 1.0%. These are the least tested numbers in this draft. Are they the right order of magnitude, should the measure be capital investment at all rather than a per-megawatt figure or a share of revenue, and how should a facility be scored where the operator will not disclose capital investment?
- Should item S1 forbid certification outright for a facility sited in a highest-quintile burden tract, rather than allowing 2 points where a cumulative impact assessment is published and mitigation agreed? A standard that can certify a facility in an already-overburdened community may be legitimising the concentration it exists to prevent.
- Is two years of committed payments the right security requirement in item F3, and should the requirement scale with the length of the agreement?
- Heat recovery now carries 6 of 100 points, down from 25 in the first draft. Is that too far? The evidence for the reduction is that host communities raise it almost never while raising noise, air, siting, and fiscal impact constantly. The argument against is that a standard should lead rather than follow.
- Where a community benefit agreement exists and includes a covenant not to challenge the approvals, should the standard require that covenant to be narrowly scoped: limited to the project as permitted, excluding expansions, and preserving claims for breach of the agreement and for later permit, environmental, or workforce violations? A facility whose agreement swept more broadly than that would score the same today as one whose agreement did not.
12. Governance
The standard is maintained by the Compute Stewardship Council, an independent nonprofit in formation. Governance, board composition, conflict of interest rules, and the founder's disclosed relationship with a recognized program designer are set out in the Governance and Independence Policy. In summary:
- Founding operator members hold advisory seats on the Standards Advisory Committee and have no deciding vote
- Certification decisions are made by an independent Certification Committee
- Criteria are revised on a two-year cycle with a 60-day public comment period
- No assessor may audit a facility they helped design or advise
Version History
| Version | Date | Notes |
|---|---|---|
| 1.0 Public Comment Draft | September 4, 2026 | Scored framework with referenced methodologies. Supersedes the September 2026 outline draft, which used pass/fail thresholds (90% hourly CFE, 30% heat reuse) that no US facility could meet. |
| 1.0 Public Comment Draft, revised (f) | September 5, 2026 | Second structural revision, from a gap audit against the published record of what host communities and their advisers actually raise. Eleven of twelve recurring themes had no coverage. The five pillars are now Water and Resource Efficiency, Additive Energy, Siting and Local Environment, Fiscal Accountability (new), and Verified Community Benefit. Added: siting against cumulative burden (S1, S2); tax abatement and incentive disclosure (F1); independent fiscal impact analysis (F2); security behind community payments (F3); emergency services training and cost recovery (F4); traffic (F5); proportionality of the contribution to capital investment (C4); workforce training (C6); electronic waste across the refresh cycle (C8). Heat recovery reduced from 25 points to 6 and folded into Pillar One, and closed-loop cooling reduced from 8 points to 5 as it approaches standard practice. New open questions 11 to 14 put the new thresholds, the siting rule, and the heat recovery reduction out for comment. |
| 1.0 Public Comment Draft, revised (e) | September 5, 2026 | Structural revision. The standard moves from four pillars of 25 points to five pillars of 20, adding Pillar Four: Local Environment covering night-time sound against pre-construction ambient, backup generator emissions and run-hour caps, dark-sky lighting, and setback and screening. Verified Community Benefit becomes Pillar Five. Every existing item was rescaled proportionally; no threshold or requirement was weakened. Tier floors rescaled, and Local Environment carries a floor at every tier including Entry. Prompted by the observation that the draft scored water, energy, heat, and money while scoring nothing a resident hears, breathes, or sees, in a sector where noise is reported as the single largest community complaint. |
| 1.0 Public Comment Draft, revised (d) | September 5, 2026 | Prompted by the CURE webinar with the Better Data Center Project: C1 now requires stipends and a paid coordinator so resident participation does not depend on volunteering; C3 treats equipment refresh as a triggering event for contributions; Section 9 requires a decommissioning bond proportional to capital value; open questions 9 (watershed replenishment) and 10 (narrowness of the community's legal release) added. |
| 1.0 Public Comment Draft, revised (c) | September 5, 2026 | Section 9 now requires the public record (scorecards, fund statements, assessment summaries) to remain published after re-tiering, suspension, sale, or decommissioning. Mirrors the program designer rule that a community dashboard outlives the consultant's contract. |
| 1.0 Public Comment Draft, revised (b) | September 5, 2026 | Pillar Four now states plainly that it assesses the execution of community benefit agreements rather than their negotiation, and C4 requires reporting against every commitment in an executed agreement, with the agreement published. Prompted by the enforcement questions left unanswered at the Brookings webinar. |
| 1.0 Public Comment Draft, revised | September 5, 2026 | Four changes prompted by the Brookings Center for Technology Innovation webinar of February 17, 2026 (Turner Lee, West, Turner, Gangas): projected load ramp disclosure added to E3; 90-day advance disclosure of projected water and power demand added to W4 and E3; new item C7 on digital access (C1 reduced to 5 and C3 to 7 to hold the pillar at 25); decommissioning and fund continuity added as a condition of certification in Section 9, with open question 8. The comment window is unchanged. |