40 CFR 23.3 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 1.1 To Appendix To Subpart M Of Part 49) — Environmental Protection Agency (§ 1.1 To Appendix To Subpart M Of Part 49) — General (§ 1.1 To § 29.13) — Judicial Review Under Epa-Administered Statutes (§ 23.1 To § 23.12) — Timing of Administrator's action under Clean Air Act.

Unless the Administrator otherwise explicitly provides in a particular promulgation, approval, or action, the time and date of such promulgation, approval or action for purposes of the second sentence of section 307(b)(1) shall be at 1:00 p.m. eastern time (standard or daylight, as appropriate) on (a) for a Federal Register document, the date when the document is published in the Federal Register, or (b) for any other document, two weeks after it is signed.