# Passenger Automobile Average Fuel Economy Standards
> **US Department of Transportation** · Final rule. · Published 1999-05-19 · Effective 1999-07-19 · 64 FR 27201
## Document
- **Document number:** 99-12607
- **Category:** other
- **Sub-agency:** US Department of Transportation
- **Federal Register citation:** 64 FR 27201
- **CFR reference:** 49 CFR 531
- **Publication date:** 1999-05-19
- **Effective date:** 1999-07-19
- **DOT docket:** Docket No. NHTSA-98-4853
## Abstract

This rule amends the passenger automobile fuel economy regulation by providing a procedure by which a vehicle manufacturer may notify NHTSA of the model year in which it elects to consider production of components and automobile assembly in Mexico as domestic value added. This domestic value added is used to determine if a passenger automobile should be assigned to the manufacturer's import or domestic fleet for computation of the fleet average fuel economy. The amendment implements a provision of the North American Free Trade Agreement Implementation Act of 1993.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/05/19/99-12607/passenger-automobile-average-fuel-economy-standards)
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