40 CFR § 66.91 - Applicability of supplemental rules.

---
identifier: "/us/cfr/t40/s66.91"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 66.91 - Applicability of supplemental rules."
title_number: 40
title_name: "Protection of Environment"
section_number: "66.91"
section_name: "Applicability of supplemental rules."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "66"
part_name: "ASSESSMENT AND COLLECTION OF NONCOMPLIANCE PENALTIES BY EPA"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Sec. 120, Clean Air Act, as amended, 42 U.S.C. 7420."
regulatory_source: "45 FR 50110, July 28, 1980, unless otherwise noted."
cfr_part: "66"
---


# 66.91 Applicability of supplemental rules.

The Supplemental Rules in this subpart, in conjunction with the Consolidated Rules of Practice (40 CFR part 22) shall govern all hearings held under this part. To the extent that the provisions of these Supplemental Rules or any other provision of this part are inconsistent with the Consolidated Rules, the provisions of this part shall govern.