23.3—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.

CFR

23.3—Timing of Administrator's action under Clean Air Act.