.13 Permit Card.

A. Permit cards will be in forms as from time to time may be prescribed by the Commission, but in all instances shall contain the Commission's permit number and the name and address of the person or persons, association or corporation, to whom or to which issued, and the permissible number of passengers. The grantee or grantees of a permit shall notify the Commission promptly of any change of address occurring after the issuance of the permit.

B. Permit cards shall be displayed publicly at all times in a conspicuous place in the taxicab for which issued and shall be subject to inspection at any time by, and upon demand of, proper authorities.