[Code of Federal Regulations] [Title 40, Volume 21] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR176.11] [Page 276] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 176--TIME-LIMITED TOLERANCES FOR EMERGENCY EXEMPTIONS--Table of Contents Sec. 176.11 Duration of a tolerance. (a) Tolerances issued under this part will become effective upon publication in the Federal Register, unless otherwise specified by the Administrator. (b) Unless extended, tolerances will automatically expire and be revoked, without further action by EPA, at the time set out in the final rule published in Federal Register. (c) The Administrator may revoke a tolerance at any time if the Administrator determines that the tolerance is no longer safe.