During the regular course of the duties of the Administrator of General Services, if the Administrator becomes aware of a violation of section 1343, 1344, or 1349(b) of title 31 or of section 641 of title 18 involving the conversion by a Federal Government official or employee of a Government-owned or leased motor vehicle to the official or employee’s own use or to the use of others, the Administrator shall report the violation to the head of the agency in which the official or employee is employed, for further investigation and either appropriate disciplinary action under section 1343, 1344, or 1349(b) of title 31 or, if appropriate, referral to the Attorney General for prosecution under section 641 of title 18.