40 CFR § 60.4765 - When does this subpart become effective?
---
identifier: "/us/cfr/t40/s60.4765"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.4765 - When does this subpart become effective?"
title_number: 40
title_name: "Protection of Environment"
section_number: "60.4765"
section_name: "When does this subpart become effective?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "60"
part_name: "STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "36 FR 24877, Dec. 23, 1971, unless otherwise noted."
cfr_part: "60"
---
# 60.4765 When does this subpart become effective?
This subpart takes effect on *September 21, 2011.* Some of the requirements in this subpart apply to planning a SSI unit and must be completed even before construction is initiated on a SSI unit (*i.e.,* the preconstruction requirements in §§ 60.4800 and 60.4805). Other requirements such as the emission limits, emission standards, and operating limits apply after the SSI unit begins operation.