{"data":{"id":"us/40-cfr-63.6615","jurisdiction":"us","citation":"40 CFR 63.6615","heading":"When must I conduct subsequent performance tests?","body":"If you must comply with the emission limitations and operating limitations, you must conduct subsequent performance tests as specified in Table 3 of this subpart.","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 ZZZZ—National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines"],"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":"91fef80e658db6563750555db40fe6a476b4ee217d2103c3de5a682292ce81a6","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.6612","next":"us/40-cfr-63.6620"},"notice":"GroundRules: Original legal text. Not legal advice."}