{"data":{"id":"us/40-cfr-63.4150","jurisdiction":"us","citation":"40 CFR 63.4150","heading":"By what date must I conduct the initial compliance demonstration?","body":"You must complete the initial compliance demonstration for the initial compliance period according to the requirements of § 63.4151. The initial compliance period begins on the applicable compliance date specified in § 63.4083 and ends on the last day of the first full month after the compliance date. If the compliance date occurs on any day other than the first day of a month, then the initial compliance period extends through the end of that month plus the next month. The initial compliance demonstration includes the calculations according to § 63.4151 and supporting documentation showing that the organic HAP emission rate for the initial compliance period was equal to or less than the applicable emission limit in § 63.4090.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart NNNN—National Emission Standards for Hazardous Air Pollutants: Surface Coating of Large Appliances"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"9cc1f02c81f8c094d3343c6c64c9bef4cd37556ea4902bf44f672571d340baf9","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.4142","next":"us/40-cfr-63.4151"},"notice":"GroundRules: Original legal text. Not legal advice."}