{"data":{"id":"us/40-cfr-1039.210","jurisdiction":"us","citation":"40 CFR 1039.210","heading":"May I get preliminary approval before I complete my application?","body":"If you send us information before you finish the application, we will review it and make any appropriate determinations, especially for questions related to engine family definitions, auxiliary emission-control devices, deterioration factors, testing for service accumulation, maintenance, and NTE deficiencies and carve-outs. Decisions made under this section are considered to be preliminary approval, subject to final review and approval. We will generally not reverse a decision where we have given you preliminary approval, unless we find new information supporting a different decision. If you request preliminary approval related to the upcoming model year or the model year after that, we will make best-efforts to make the appropriate determinations as soon as practicable. We will generally not provide preliminary approval related to a future model year more than two years ahead of time.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1039—CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES","Subpart C—Certifying Engine Families"],"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":"e385149f54c54363efa95aed41292080abca45c1a5b5b2e5411afcc60c47a69a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1039.205","next":"us/40-cfr-1039.220"},"notice":"GroundRules: Original legal text. Not legal advice."}