[Code of Federal Regulations] [Title 40, Volume 14] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR74.1] [Page 177] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 74--SULFUR DIOXIDE OPT-INS--Table of Contents Subpart A--Background and Summary Sec. 74.1 Purpose and scope. The purpose of this part is to establish the requirements and procedures for: (a) The election of a combustion or process source that emits sulfur dioxide to become an affected unit under the Acid Rain Program, pursuant to section 410 of title IV of the Clean Air Act, 42 U.S.C. 7401, et seq., as amended by Public Law 101-549 (November 15, 1990); and (b) Issuing and modifying operating permits; certifying monitors; and allocating, tracking, transferring, surrendering and deducting allowances for combustion or process sources electing to become affected units.