40 CFR § 280.91 - Compliance dates.

---
identifier: "/us/cfr/t40/s280.91"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 280.91 - Compliance dates."
title_number: 40
title_name: "Protection of Environment"
section_number: "280.91"
section_name: "Compliance dates."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "I"
subchapter_name: "SOLID WASTES"
part_number: "280"
part_name: "TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR OWNERS AND OPERATORS OF UNDERGROUND STORAGE TANKS (UST)"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 6912, 6991, 6991(a), 6991(b), 6991(c), 6991(d), 6991(e), 6991(f), 6991(g), 6991(h), 6991(i)."
regulatory_source: "80 FR 41623, July 15, 2015, unless otherwise noted."
cfr_part: "280"
---


# 280.91 Compliance dates.

Owners of petroleum underground storage tanks must comply with the requirements of this subpart. Previously deferred UST systems must comply with the requirements of this subpart according to the schedule in § 280.251(a).