[Code of Federal Regulations] [Title 40, Volume 24] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR281.23] [Page 523-524] TITLE 40--PROTECTION OF ENVIRONMENT AGENCY (CONTINUED) PART 281--APPROVAL OF STATE UNDERGROUND STORAGE TANK PROGRAMS--Table of Contents Subpart B--Components of a Program Application Sec. 281.23 Schedule for interim approval. For a state program that must modify its statutory or regulatory requirements for release detection, release reporting and investigation, and out-of-service or closed UST systems in order to be no less stringent than the federal [[Page 524]] requirements, the plan must include a schedule for making such changes and for submitting an amendment to the state application in accordance with Sec. 281.51.