[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: 40CFR281.31] [Page 524] TITLE 40--PROTECTION OF ENVIRONMENT AGENCY (CONTINUED) PART 281--APPROVAL OF STATE UNDERGROUND STORAGE TANK PROGRAMS--Table of Contents Subpart C--Criteria for No-Less-Stringent Sec. 281.31 Upgrading existing UST systems. In order to be considered no less stringent than the corresponding federal upgrading requirements, the state must have requirements that ensure existing UST systems will be replaced or upgraded before December 22, 1998, to prevent releases for their operating life due to corrosion, and spills or overfills. [[Page 525]]