CFR›Title 40›Chapter I›Part 123›Subpart D ContainsSections 123.61–123.64CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart D—Program Approval, Revision, and Withdrawal Sections 123.61 § 123.61 Approval process. 123.62 § 123.62 Procedures for revision of State programs. 123.63 § 123.63 Criteria for withdrawal of State programs. 123.64 § 123.64 Procedures for withdrawal of State programs. Previous C Subpart C—Transfer of Information and Permit Review