Section 20. License for Enlisted Men Operating Government Motor Vehicles. —

Enlisted men operating a motor vehicle owned by the Government of the Philippines shall be licensed in accordance with the provisions of this Act, but no license or delinquency fees shall be collected therefrom. All licenses so issued shall bear the words "For Government Vehicles Only" plainly marked or stamped in red ink across the face thereof.

A license so marked or stamped shall not authorize the holder thereof to operate a private-owned motor vehicle.