c What requirements apply to revisions to my state or Tribal plan?

40 C.F.R. § 60.5371c
in effect
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(a) Any significant revision to a state or Tribal plan shall be adopted and submitted as specified in § 60.28a. (b) A revision of a plan, or any portion thereof, shall not be considered part of an applicable plan until approved by the Administrator in accordance with this subpart and subpart Ba of this part.
Source: ecfr_bulkFetched: 7/26/2026
Source: eCFR APIURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-40.xml?part=60Fetched: 5/31/2026