Title IV of the Clean Air Act (the Act), as amended by the Clean Air Act Amendments of 1990, authorizes the Environmental Protection Agency (EPA or Agency) to establish the Acid Rain Program. The program sets emissions limitations to reduce acidic deposition and its serious, adverse effects on natural resources, ecosystems, materials, visibility, and public health. On January 11, 1993, the Agency promulgated final rules under title IV. Several parties filed petitions for review of the rules. On April 17, 1995, the EPA and the parties signed a settlement agreement addressing continuous emission monitoring (CEM) issues. This direct final rule would amend the Continuous Emission Monitoring (CEM) provisions and the General Provisions of the Acid Rain Program for the purpose of making the implementation of the program simpler, streamlined, and more efficient for both the EPA and industry. The rule amendment is being issued as a direct final rule because the corrections are technical in nature and address various implementation issues without major changes in policy. Furthermore, the rule amendments are consistent with the April 17, 1995 settlement agreement. Therefore, EPA believes these amendments are noncontroversial and has provided for the amendments to be effective 60 days after publication in the Federal Register.