40 CFR § 61.06 - Determination of construction or modification.
---
identifier: "/us/cfr/t40/s61.06"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 61.06 - Determination of construction or modification."
title_number: 40
title_name: "Protection of Environment"
section_number: "61.06"
section_name: "Determination of construction or modification."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "61"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS"
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. 7401"
regulatory_source: "38 FR 8826, Apr. 6, 1973, unless otherwise noted."
cfr_part: "61"
---
# 61.06 Determination of construction or modification.
An owner or operator may submit to the Administrator a written application for a determination of whether actions intended to be taken by the owner or operator constitute construction or modification, or commencement thereof, of a source subject to a standard. The Administrator will notify the owner or operator of his determination within 30 days after receiving sufficient information to evaluate the application.
[50 FR 46291, Nov. 7, 1985]