16 GCA § 7169: Fees: Government Cars.

(a) Except fees for duplicate license plates, certificates or cards, the fees specified in this Title need not be paid for any vehicle of a type subject to registration under this Title owned by any foreign government or by a consul or other official representative thereof, or by the United States, or by the government of Guam.

(b) All such vehicles so exempted from the payment of registration fees shall be registered as otherwise required by this Title, by the person having custody thereof and such custodian shall display upon such vehicle a license plate or plates bearing distinguishing marks or symbols as hereinbefore specified, which plate or plates shall be furnished by the Department of Revenue and Taxation free of charge.