49 CFR §575.4

1. (a)General. Except as provided in paragraphs (b) through (d) of this section, each section set forth in subpart B of this part applies according to its terms to motor vehicles and tires manufactured after the effective date indicated.
2. (b)Military vehicles. This part does not apply to motor vehicles or tires sold directly to the Armed Forces of the United States in conformity with contractual specifications.
3. (c)Export. This part does not apply to motor vehicles or tires intended solely for export and so labeled or tagged.
4. (d)Import. This part does not apply to motor vehicles or tires imported for purposes other than resale.