14 C.F.R. § 1274.206 Metric Conversion Act.
Title 14 - Aeronautics and Space
The Metric Conversion Act, as amended by the Omnibus Trade and Competitiveness Act (15 U.S.C. 205) declares that the metric system is the preferred measurement system for U.S. trade and commerce. NASA's policy with respect to the metric measurement system is stated in NPD 8010.2, Use of the Metric System of Measurement in NASA Programs.
Title 14: Aeronautics and Space
PART 1274—COOPERATIVE AGREEMENTS WITH COMMERCIAL FIRMS
Subpart 1274.2—Pre-Award Requirements
§ 1274.206 Metric Conversion Act.

