{"data":{"id":"us/40-cfr-63.5541","jurisdiction":"us","citation":"40 CFR 63.5541","heading":"When must I conduct subsequent performance tests?","body":"(a) For each affected source utilizing a non-recovery control device to comply with § 63.5515 that commenced construction or reconstruction before September 9, 2019, a periodic performance test must be performed by July 2, 2023, and subsequent tests no later than 60 months thereafter.\n(b) For each affected source utilizing a non-recovery control device to comply with § 63.5515 that commences construction or reconstruction after September 9, 2019, a periodic performance test must be performed no later than 60 months after the initial performance test required by § 63.5535, and subsequent tests no later than 60 months thereafter.","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 UUUU—National Emission Standards for Hazardous Air Pollutants for Cellulose Products Manufacturing"],"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":"97080c2cc6e88f8f28989f243ca0458e9333d0f1fc7121fb2b2a0fc9746dfb92","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.5540","next":"us/40-cfr-63.5545"},"notice":"GroundRules: Original legal text. Not legal advice."}