Regulations last checked for updates: Mar 28, 2026

Title 40 - Protection of Environment last revised: Dec 15, 2026
Appendix - Table 2 to Subpart PPP of Part 63—Applicability of HON and Group 1 Polymers and Resins Provisions to Subpart PPP Affected Sources
Reference Applies to subpart PPP Explanation Applicable section of subpart PPP
Subpart F:
§ 63.100No
§ 63.101YesSeveral definitions from § 63.101 are referenced at § 63.1423§ 63.1423
§§ 63.102—63.103No
§ 63.104YesWith the differences noted in § 63.1435(b) through (i)§ 63.1435.
§ 63.105YesWith the differences noted in § 63.1433(b)§ 63.1433.
§ 63.106No
Subpart G:
§ 63.107No
§ 63.108YesWith the differences noted in § 63.1436(b)
§ 63.109YesWith the differences noted in the definition of “in ethylene oxide service” in § 63.1423(b)
§ 63.110No
§ 63.111No
§ 63.112No
§§ 63.113-63.118YesFor THF facilities, with the differences noted in § 63.1425(f)(1) through (15)§ 63.1425.
NoFor epoxide facilities, except that § 63.115(d) is used for TRE determinations§ 63.1428.
§§ 63.119-63.123YesWith the differences noted in § 63.1432(b) through 63.1432(w)§ 63.1432.
§ 63.124YesWith the differences noted in §§ 63.1426(g) and 63.1432(w)§§ 63.1426 and 63.1432.
§ 63.125NoReserved
§§ 63.126-63.130YesWith the differences noted in paragraphs § 63.1434(i)(1) through (13)§ 63.1434.
§ 63.131NoReserved
§§ 63.132-63.147YesWith the differences noted in § 63.1433(a)(1) through (26)§ 63.1433.
§§ 63.148-63.149YesWith the differences noted in §§ 63.1432(b) through (v) and 63.1433(a)(1) through (26)§§ 63.1432 and 63.1433.
§ 63.150No
§§ 63.151-63.152No
§ 63.153No§ 63.1421
Subpart H:
§§ 63.160-63.182YesSubpart PPP affected sources shall comply with all requirements of subpart H to this part, with the differences noted in §§ 63.1422(d) and 63.1434§ 63.1434.
§ 63.183No§ 63.1421
§ 63.184No
Subpart U:
§§ 63.480-63.487No
§ 63.488YesPortions of § 63.488(b) and (e) are cross-referenced in subpart PPP
§§ 63.489-63.506No
[91 FR 13185, Mar. 18, 2026]
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.