CFR › Title 40 › Part 63 › §63.129340 CFR §63.1293Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkEach owner or operator of a new or existing slabstock affected source shall comply with §§ 63.1294, 63.1297, and 63.1298.