(a) Government cartage. The cartage of merchandise in Customs custody designated for examination at the public stores shall be done by a licensed customhouse cartman or a bonded carrier under contract or other specific authority for that purpose.

(b) Where there is no contract for Government cartage. At ports where there is no contract for Government cartage in effect, the cartage of packages designated for examination at the public stores shall be done by a licensed customhouse cartman or a bonded carrier designated by the port director for this purpose.

(c) Payment for Government cartmen. The cost of the cartage shall be paid by Customs.