41 CFR § 102-34.90
What motor vehicle identification must we display on Government motor vehicles?
June 9, 2020
Unless exempted under §102-34.160, §102-34.175 or §102-34.180, Government motor vehicles must display the following identification:
(a) “For Official Use Only”;
(b) “U.S. Government”; and
(c) Identification that readily identifies the agency owning the vehicle.