CFR›Title 40›Chapter I›Part 66›Subpart B ContainsSections 66.11–66.13CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart B—Notice of Noncompliance Sections 66.11 § 66.11 Issuance of notices of noncompliance. 66.12 § 66.12 Content of notices of noncompliance. 66.13 § 66.13 Duties of source owner or operator upon receipt of a notice of noncompliance. Previous Appendix C to Part 66 Appendix C to Part 66—Computer Program Next I Subpart I—Final Action