U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 74 - PART 74—SULFUR DIOXIDE OPT-INS
Subpart A [§ 74.1 - § 74.4] - Subpart A—Background and Summary
Subpart B [§ 74.10 - § 74.19] - Subpart B—Permitting Procedures
Subpart C [§ 74.20 - § 74.28] - Subpart C—Allowance Calculations for Combustion Sources
Subpart D - Subpart D—Allowance Calculations for Process Sources [Reserved]
Subpart E [§ 74.40 - § 74.50] - Subpart E—Allowance Tracking and Transfer and End of Year Compliance
Subpart F [§ 74.60 - § 74.61] - Subpart F—Monitoring Emissions: Combustion Sources
Subpart G - Subpart G—Monitoring Emissions: Process Sources [Reserved]
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