---
kind: "section"
citation: "40 C.F.R. § 1033.210"
title: "40"
number: "1033.210"
heading: "Preliminary approval."
url: "https://uscodex.org/cfr/40/1033.210"
---

# §1033.210. Preliminary approval.

- (a) If you send us information before you finish the application, we will review it and make any appropriate determinations for questions related to engine family definitions, auxiliary emission-control devices, deterioration factors, testing for service accumulation, maintenance, and useful lives.
- (b) 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.
- (c) 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 three years ahead of time.
- (d) You must obtain preliminary approval for your plan to develop deterioration factors prior to the start of any service accumulation to be used to develop the factors.

## Notes

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 73 FR 37197, June 30, 2008, unless otherwise noted.