40 CFR § 270.160
When does my RAP become effective?
June 9, 2020
Your RAP becomes effective 30 days after the Director notifies you and all commenters that your RAP is approved unless:
(a) The Director specifies a later effective date in his decision;
(b) You or another person has appealed your RAP under §270.155 (if your RAP is appealed, and the request for review is granted under §270.155, conditions of your RAP are stayed according to §124.16 of this chapter); or
(c) No commenters requested a change in the draft RAP, in which case the RAP becomes effective immediately when it is issued.