40 CFR § 61.06
Determination of construction or modification
June 9, 2020
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]