{"data":{"id":"us/40-cfr-87.48","jurisdiction":"us","citation":"40 CFR 87.48","heading":"Derivative engines for emissions certification purposes.","body":"Provisions related to derivative engines for emissions certification purposes apply as described in 40 CFR 1031.130.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 87—CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT 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":"9bb5e6999f7cd7fded71861df96435c0a4b7f0a54f54eeec40d1a2ed3d56aba5","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-87.31","next":"us/40-cfr-87.50"},"notice":"GroundRules: Original legal text. Not legal advice."}