40 CFR Part 63, Table 1
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Reference | Applies to subpart W | Comment |
|---|---|---|
| BLR | WSR | WSR equipment leak standard, and BLR equipment leak standard (40 CFR part 63, subpart H) |
| § 63.1(a)(1) | Yes | Yes | Yes | Additional terms defined in § 63.522. |
| § 63.1(a)(2) | Yes | Yes | Yes | |
| § 63.1(a)(3) | Yes | Yes | Yes | |
| § 63.1(a)(4) | Yes | Yes | Yes | Subpart W specifies applicability of each paragraph in subpart A to subpart W. |
| § 63.1(a)(5) | N/A | N/A | N/A | Reserved. |
| § 63.1(a)(6) | Yes | Yes | Yes | |
| § 63.1(a)(7) | Yes | Yes | Yes | |
| § 63.1(a)(8) | No | No | No | Discusses State programs. |
| § 63.1(a)(9) | N/A | N/A | N/A | Reserved. |
| § 63.1(a)(10) | Yes | Yes | Yes | |
| § 63.1(a)(11) | Yes | Yes | Yes | |
| § 63.1(a)(12)-(14) | Yes | Yes | Yes | |
| § 63.1(b)(1) | No | No | No | § 63.521 of subpart W specifies applicability. |
| § 63.1(b)(2) | Yes | Yes | Yes | |
| § 63.1(b)(3) | Yes | Yes | Yes | |
| § 63.1(c)(1) | Yes | Yes | Yes | Subpart W specifies applicability of each paragraph in subpart A to sources subject to subpart W. |
| § 63.1(c)(2) | No | No | No | Area sources are not subject to subpart W. |
| § 63.1(c)(3) | N/A | N/A | N/A | Reserved. |
| § 63.1(c)(4) | Yes | Yes | Yes | |
| § 63.1(c)(5) | Yes | Yes | No | Subpart H specifies applicable notification requirements. |
| § 63.1(c)(6) | Yes | Yes | Yes | |
| § 63.1(d) | N/A | N/A | N/A | Reserved. |
| § 63.1(e) | Yes | Yes | Yes | |
| § 63.2 | Yes | Yes | Yes | Additional terms are defined in § 63.522 of subpart W; when overlap between subparts A and W occurs, subpart W takes precedence. |
| § 63.3 | Yes | Yes | No | Other units used in subpart W are defined in that subpart; units of measure are spelled out for subpart H. |
| § 63.4(a)(1)-(3) | Yes | Yes | Yes | |
| § 63.4(a)(4) | N/A | N/A | N/A | Reserved. |
| § 63.4(a)(5) | Yes | Yes | Yes | |
| § 63.4(b) | Yes | Yes | Yes | |
| § 63.4(c) | Yes | Yes | Yes | |
| § 63.5(a) | Yes | Yes | Yes | Except replace the terms “source” and “stationary source” in § 63.5(a)(1) of subpart A with “affected source”. |
| § 63.5(b)(1) | Yes | Yes | Yes | |
| § 63.5(b)(2) | N/A | N/A | N/A | Reserved. |
| § 63.5(b)(3) | Yes | Yes | Yes | |
| § 63.5(b)(4) | Yes | Yes | Yes | |
| § 63.5(b)(5) | Yes | Yes | Yes | |
| § 63.5(b)(6) | Yes | Yes | Yes | |
| § 63.5(c) | N/A | N/A | N/A | Reserved. |
| § 63.5(d)(1)(i) | Yes | Yes | Yes | |
| § 63.5(d)(1)(ii) | Yes | Yes | Yes | |
| § 63.5(d)(1)(iii) | Yes | Yes | Yes | |
| § 63.5(d)(2) | Yes | Yes | Yes | |
| § 63.5(d)(3)-(4) | Yes | Yes | Yes | |
| § 63.5(e) | Yes | Yes | Yes | |
| § 63.5(f)(1) | Yes | Yes | Yes | Except replace “source” in § 63.5(f)(1) of subpart A with “affected source”. |
| § 63.5(f)(2) | Yes | Yes | Yes | |
| § 63.6(a) | Yes | Yes | Yes | |
| § 63.6(b)(1)-(2) | No | No | No | Subpart W specifies compliance dates. |
| § 63.6(b)(3)-(4) | Yes | Yes | Yes | |
| § 63.6(b)(5) | | Yes | No | Subpart H includes notification requirements. |
| § 63.6(b)(6) | N/A | N/A | N/A | Reserved. |
| § 63.6(b)(7) | No | Yes | No | Sources subject to subpart H must comply according to the schedule in § 63.520 of subpart W for new sources subject to subpart H. |
| § 63.6(c)(1)-(2) | Yes | Yes | Yes | Except replace “source” in § 63.6(c)(1)-(2) of subpart A with “affected source”. |
| § 63.6(c)(3)-(4) | N/A | N/A | N/A | Reserved. |
| § 63.6(c)(5) | Yes | Yes | Yes | |
| § 63.6(d) | N/A | N/A | N/A | Reserved. |
| § 63.6(e) | Yes | Yes | Yes | |
| § 63.6(e)(1)(i) | Reserved. | | | |
| § 63.6(e)(1)(ii) | See Comment | Yes, before July 15, 2027. No, beginning on and after July 15, 2027. |
| § 63.6(e)(1)(iii) | Yes | Yes | Yes | |
| 63.6(e)(2) | N/A | N/A | N/A | Reserved. |
| 63.6(e)(3) | See Comment | Yes, before July 15, 2027. No, beginning on and after July 15, 2027. |
| § 63.6(f)(1) | Yes | Yes | Yes | |
| § 63.6(f)(2)(i)-(ii) | Yes | Yes | Yes | |
| § 63.6(f)(2)(iii) | Yes | Yes | Yes | |
| § 63.6(f)(2)(iv) | Yes | Yes | Yes | |
| § 63.6(f)(3) | Yes | Yes | Yes | |
| § 63.6(g) | Yes | Yes | Yes | Affected sources have the opportunity to demonstrate other alternatives to the Administrator. |
| § 63.6(h) | No | No | No | Subpart W does not contain any opacity or visible emissions standards. |
| § 63.6(i)(1) | Yes | Yes | Yes | |
| § 63.6(i)(2) | Yes | Yes | Yes | Except replace “source” in § 63.6(2) (i) and (ii) of subpart A with “affected source”. |
| § 63.6(i)(3) | Yes | Yes | Yes | |
| § 63.6(i)(4)(i) | Yes | Yes | Yes | |
| § 63.6(i)(4)(ii) | Yes | Yes | Yes | |
| § 63.6(i)(5)-(14) | Yes | Yes | Yes | |
| § 63.6(i)(15) | N/A | N/A | N/A | Reserved. |
| § 63.6(i)(16) | Yes | Yes | Yes | |
| § 63.6(j) | Yes | Yes | Yes | |
| § 63.7(a)(1) | Yes | Yes | No | Subpart H specifies required testing and compliance procedures. |
| § 63.7(a)(2)(i)-(vi) | Yes | Yes | No | Subpart H specifies that test results must be submitted in the Notification of Compliance Status due 150 days after the compliance date. |
| § 63.7(a)(2)(vii)-(viii) | N/A | N/A | N/A | Reserved. |
| § 63.7(a)(2)(ix) | Yes | Yes | Yes | |
| § 63.7(a)(3) | Yes | Yes | Yes | |
| § 63.7(a)(4) | Yes | Yes | Yes | |
| § 63.7(b)(1) | Yes | Yes | Yes | |
| § 63.7(b)(2) | Yes | Yes | Yes | |
| § 63.7(c) | No | No | No | |
| § 63.7(d) | Yes | Yes | Yes | Except replace “source” in § 63.7(d) of subpart A with “affected source”. |
| § 63.7(e)(1) | Yes, before July 15, 2027. No, beginning on and after July 15, 2027. | See § 63.525(l). Subpart W also contains test methods specific to BLR and WSR sources. |
| § 63.7(e)(2) | Yes | Yes | Yes | |
| § 63.7(e)(3) | Yes | Yes | No | Subpart H specifies test methods and procedures. |
| § 63.7(f) | Yes | Yes | No | Subpart H specifies applicable methods and provides alternatives. |
| § 63.7(g)(1) | Yes | Yes | No | Subpart H specifies performance test reporting. Additionally, this subpart specifies how and when the performance test results are reported for BLR and WSR. |
| § 63.7(g)(2) | N/A | N/A | N/A | Reserved. |
| § 63.7(g)(3) | Yes | Yes | Yes | |
| § 63.7(h)(1)-(2) | Yes | Yes | Yes | |
| § 63.7(h)(3)(i) | Yes | Yes | Yes | |
| § 63.7(h)(3)(ii)-(iii) | Yes | Yes | Yes | |
| § 63.7(h)(4)-(5) | Yes | Yes | Yes | |
| § 63.8(a)(1) | Yes | Yes | Yes | |
| § 63.8(a)(2) | Yes | Yes | Yes | |
| § 63.8(a)(3) | N/A | N/A | N/A | Reserved. |
| § 63.8(a)(4) | Yes | Yes | Yes | |
| § 63.8(b)(1) | Yes | Yes | Yes | |
| § 63.8(b)(2) | Yes | Yes | No | Subpart H specifies locations to conduct monitoring. |
| § 63.8(b)(3) | Yes | Yes | Yes | |
| § 63.8(c)(1)(i) | Yes, before July 15, 2027. No, beginning on and after July 15, 2027. | |
| § 63.8(c)(1)(ii) | Yes | Yes | Yes | |
| § 63.8(c)(1)(iii) | Yes, before July 15, 2027. No, beginning on and after July 15, 2027. | |
| § 63.8(c)(2)-(3) | Yes | Yes | Yes | |
| § 63.8(c)(4)-(8) | No | No | No | Subpart W specifies monitoring frequencies. |
| § 63.8(d) | No | No | No | |
| § 63.8(e) | No | No | No | |
| § 63.8(f)(1) | Yes | Yes | Yes | |
| § 63.8(f)(2) | Yes | Yes | Yes | |
| § 63.8(f)(3) | Yes | Yes | Yes | |
| § 63.8(f)(4) | Yes | Yes | Yes | |
| § 63.8(f)(5) | Yes | Yes | Yes | |
| § 63.8(f)(6) | Yes | Yes | No | |
| § 63.8(g) | Yes | Yes | Yes | |
| § 63.9(a) | Yes | Yes | Yes | |
| § 63.9(b)(1)(i)-(ii) | Yes | Yes | Yes | |
| § 63.9(b)(1)(iii) | Yes | Yes | Yes | |
| § 63.9(b)(2) | Yes | Yes | Yes | |
| § 63.9(b)(3) | Yes | Yes | Yes | |
| § 63.9(b)(4) | Yes | Yes | Yes | |
| § 63.9(b)(5) | Yes | Yes | Yes | |
| § 63.9(c) | Yes | Yes | Yes | |
| § 63.9(d) | Yes | Yes | Yes | |
| § 63.9(e) | No | No | No | |
| § 63.9(f) | No | No | No | |
| § 63.9(g) | No | No | No | |
| § 63.9(h)(1)-(3) | Yes | Yes | No | Separate Notification of Compliance Status requirements are specified for subpart H. |
| § 63.9(h)(4) | N/A | N/A | N/A | Reserved. |
| § 63.9(h)(5)-(6) | Yes | Yes | No | Subpart H specifies Notification of Compliance Status requirements. |
| § 63.9(i) | Yes | Yes | Yes | |
| § 63.9(j) | Yes | Yes | Yes | |
| § 63.9(k) | Yes | Yes | Yes | |
| § 63.10(a) | Yes | Yes | Yes | |
| § 63.10(b)(1) | Yes | Yes | Yes | |
| § 63.10(b)(2) | No | No | No | Subparts H and W specify recordkeeping requirements. |
| § 63.10(b)(3) | Yes | Yes | Yes | |
| § 63.10(c)(1)-(6) | No | No | No | |
| § 63.10(c)(7)-(8) | Yes | Yes | Yes | |
| § 63.10(c)(9)-(15) | No | No | No | |
| § 63.10(d)(1) | Yes | Yes | No | Subpart H specifies performance test reporting requirements. |
| § 63.10(d)(2) | No | No | No | This subpart and Subpart H specify performance test reporting requirements. |
| § 63.10(d)(3) | No | No | No | |
| § 63.10(d)(4) | Yes | Yes | Yes | |
| § 63.10(d)(5) | Yes, before July 15, 2027. No, beginning on and after July 15, 2027. | |
| § 63.10(e)(1)-(2) | No | No | No | |
| § 63.10(e)(3) | Yes | Yes | No | Except that on and after July 15, 2027, the reports shall be submitted according to and in the format required by § 63.528(a). |
| § 63.10(e)(4) | No | No | No | |
| § 63.10(f) | Yes | Yes | Yes | |
| § 63.11-63.15 | Yes | Yes | Yes | |
[60 FR 12676, Mar. 8, 1995, as amended at 85 FR 73891, Nov. 19, 2020; 89 FR 43274, May 16, 2024]
Editorial Note:At 89 FR 43274, May 16, 2024, table 1 to subpart W was amended in part by revising entry “§ 63.6(e)(1)(i)”. However, the amendment could not be incorporated due to an inaccurate amendatory instruction.
[60 FR 12676, Mar. 8, 1995, as amended at 89 FR 43274, May 16, 2024]