40 CFR Part 63, Appendix A
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| 40 CFR citation | Requirement | Applies to subpart AA | Comment |
|---|---|---|---|
| § 63.1(a)(1) through (4) | General Applicability | Yes | None. |
| § 63.1(a)(5) | | No | [Reserved]. | |
| § 63.1(a)(6) | Contact information | Yes | None. |
| § 63.1(a)(7)-(9) | | No | [Reserved]. | |
| § 63.1(a)(10) through (12) | Time periods | Yes | None. |
| § 63.1(b) | Initial Applicability Determination | Yes | None. |
| § 63.1(c)(1) | Applicability After Standard Established | Yes | None. |
| § 63.1(c)(2) | Permits | Yes | Some plants may be area sources. |
| § 63.1(c)(3)-(4) | | No | [Reserved]. | |
| § 63.1(c)(5) | Area to Major source change | Yes | None. |
| § 63.1(c)(6) | | Yes | None. | |
| § 63.1(d) | | No | [Reserved]. | |
| § 63.1(e) | Applicability of Permit Program | Yes | None. |
| § 63.2 | Definitions | Yes | Additional definitions in § 63.601. |
| § 63.3 | Units and Abbreviations | Yes | None. |
| § 63.4(a)(1) and (2) | Prohibited Activities | Yes | None. |
| § 63.4(a)(3) through (5) | | No | [Reserved]. | |
| § 63.4(b) and (c) | Circumvention/Fragmentation | Yes | None. |
| § 63.5(a) | Construction/Reconstruction Applicability | Yes | None. |
| § 63.5(b)(1) | Existing, New, Reconstructed Sources Requirements | Yes | None. |
| § 63.5(b)(2) | | No | [Reserved]. | |
| § 63.5(b)(3), (4), and (6) | Construction/Reconstruction approval and notification | Yes | None. |
| § 63.5(b)(5) | | No | [Reserved]. | |
| § 63.5(c) | | No | [Reserved]. | |
| § 63.5(d) | Application for Approval of Construction/Reconstruction | Yes | None. |
| § 63.5(e) | Approval of Construction/Reconstruction | Yes | None. |
| § 63.5(f) | Approval of Construction/Reconstruction Based on State Review | Yes | None. |
| § 63.6(a) | Compliance with Standards and Maintenance Applicability | Yes | None. |
| § 63.6(b)(1) through (5) | New and Reconstructed Sources Dates | Yes | See also § 63.602. |
| § 63.6(b)(6) | | No | [Reserved]. | |
| § 63.6(b)(7) | Area to major source change | Yes | None. |
| § 63.6(c)(1)and (2) | Existing Sources Dates | Yes | § 63.602 specifies dates. |
| § 63.6(c)(3) and (4) | | No | [Reserved]. | |
| § 63.6(c)(5) | Area to major source change | Yes | None. |
| § 63.6(d) | | No | [Reserved]. | |
| § 63.6(e)(1)(i) and (ii) | Operation & Maintenance Requirements | No | See § 63.608(b) for general duty requirement. |
| § 63.6(e)(iii) | | Yes | None. | |
| § 63.6(e)(2) | | No | [Reserved]. | |
| § 63.6(e)(3) | Startup, Shutdown, and Malfunction Plan | No | None. |
| § 63.6(f) | Compliance with Emission Standards | No | See general duty at § 63.608(b). |
| § 63.6(g) | Alternative Standard | Yes | None. |
| § 63.6(h) | Compliance with Opacity/VE Standards | No | Subpart AA does not include VE/opacity standards. |
| § 63.6(i)(1) through (14) | Extension of Compliance | Yes | None. |
| § 63.6(i)(15) | | No | [Reserved]. | |
| § 63.6(i)(16) | | Yes | None. | |
| § 63.6(j) | Exemption from Compliance | Yes | None. |
| § 63.7(a) | Performance Test Requirements Applicability | Yes | None. |
| § 63.7(b) | Notification | Yes | None. |
| § 63.7(c) | Quality Assurance/Test Plan | Yes | None. |
| § 63.7(d) | Testing Facilities | Yes | None. |
| § 63.7(e)(1) | Conduct of Tests; startup, shutdown, and malfunction provisions | No | § 63.606 specifies additional requirements. |
| § 63.7(e)(2) through (4) | Conduct of Tests | Yes | § 63.606 specifies additional requirements. |
| § 63.7(f) | Alternative Test Method | Yes | None. |
| § 63.7(g) | Data Analysis | Yes | None. |
| § 63.7(h) | Waiver of Tests | Yes | None. |
| § 63.8(a) | Monitoring Requirements Applicability | Yes | None. |
| § 63.8(b) | Conduct of Monitoring | Yes | None. |
| § 63.8(c)(1)(i) | General duty to minimize emissions and CMS operation | No | See 63.608(b) for general duty requirement. |
| § 63.8(c)(1)(ii) | | Yes | None. | |
| § 63.8(c)(1)(iii) | Requirement to develop SSM Plan for CMS | No | None. |
| § 63.8(c)(2) through (4) | CMS Operation/Maintenance | Yes | None. |
| § 63.8(c)(5) | COMS Operation | No | Subpart AA does not require COMS. |
| § 63.8(c)(6) through (8) | CMS requirements | Yes | None. |
| § 63.8(d)(1) and (2) | Quality Control | Yes | None. |
| § 63.8(d)(3) | Written procedure for CMS | No | See § 63.608 for requirement. |
| § 63.8(e) | CMS Performance Evaluation | Yes | None. |
| § 63.8(f)(1) through (5) | Alternative Monitoring Method | Yes | None. |
| § 63.8(f)(6) | Alternative to RATA Test | Yes | None. |
| § 63.8(g)(1) | Data Reduction | Yes | None. |
| § 63.8(g)(2) | | Yes | None. | |
| § 63.8(g)(3) through (5) | | Yes | None. | |
| § 63.9(a) | Notification Requirements Applicability | Yes | None. |
| § 63.9(b) | Initial Notifications | Yes | None. |
| § 63.9(c) | Request for Compliance Extension | Yes | None. |
| § 63.9(d) | New Source Notification for Special Compliance Requirements | Yes | None. |
| § 63.9(e) | Notification of Performance Test | Yes | None. |
| § 63.9(f) | Notification of VE/Opacity Test | No | Subpart AA does not include VE/opacity standards. |
| § 63.9(g) | Additional CMS Notifications | Yes | Subpart AA does not require CMS performance evaluation, COMS, or CEMS. |
| § 63.9(h)(1) through (3) | Notification of Compliance Status | Yes | None. |
| § 63.9(h)(4) | | No | [Reserved]. | |
| § 63.9(h)(5) and (6) | | Yes | None. | |
| § 63.9(i) | Adjustment of Deadlines | Yes | None. |
| § 63.9(j) | Change in Previous Information | Yes | None. |
| § 63.9(k) | | Yes | Only as specified in § 63.9(j). | |
| § 63.10(a) | Recordkeeping/Reporting-Applicability | Yes | None. |
| § 63.10(b)(1) | General Recordkeeping Requirements | Yes | None. |
| § 63.10(b)(2)(i) | Startup or shutdown duration | No | None. |
| § 63.10(b)(2)(ii) | Malfunction | No | See § 63.607 for recordkeeping and reporting requirement. |
| § 63.10(b)(2)(iii) | Maintenance records | Yes | None. |
| § 63.10(b)(2)(iv) and (v) | Startup, shutdown, malfunction actions | No | None. |
| § 63.10(b)(2)(vi) through (xiv) | General Recordkeeping Requirements | Yes | None. |
| § 63.10(b)(3) | General Recordkeeping Requirements | Yes | None. |
| § 63.10(c)(1) | Additional CMS Recordkeeping | Yes | None. |
| § 63.10(c)(2) through (4) | | No | [Reserved]. | |
| § 63.10(c)(5) | | Yes | None. | |
| § 63.10(c)(6) | | Yes | None. | |
| § 63.10(c)(7) and (8) | | Yes | None. | |
| § 63.10(c)(9) | | No | [Reserved]. | |
| § 63.10(c)(10) through (13) | | Yes | None. | |
| § 63.10(c)(14) | | Yes | None. | |
| § 63.10(c)(15) | Startup Shutdown Malfunction Plan Provisions | No | None. |
| § 63.10(d)(1) | General Reporting Requirements | Yes | None. |
| § 63.10(d)(2) | Performance Test Results | Yes | None. |
| § 63.10(d)(3) | Opacity or VE Observations | No | Subpart AA does not include VE/opacity standards. |
| § 63.10(d)(4) | Progress Reports | Yes | None. |
| § 63.10(d)(5) | Startup, Shutdown, and Malfunction Reports | No | See § 63.607 for reporting of excess emissions. |
| § 63.10(e)(1) and (2) | Additional CMS Reports | Yes | None. |
| § 63.10(e)(3) | Excess Emissions/CMS Performance Reports | Yes | None. |
| § 63.10(e)(4) | COMS Data Reports | No | Subpart AA does not require COMS. |
| § 63.10(f) | Recordkeeping/Reporting Waiver | Yes | None. |
| § 63.11 | Control Device and Work Practice Requirements | Yes | None. |
| § 63.12 | State Authority and Delegations | Yes | None. |
| § 63.13 | Addresses | Yes | None. |
| § 63.14 | Incorporation by Reference | Yes | None. |
| § 63.15 | Information Availability/Confidentiality | Yes | None. |
| § 63.16 | Performance Track Provisions | No | Terminated. |
[80 FR 50436, Aug. 19, 2015, as amended at 85 FR 73892, Nov. 19, 2020]