(a) Except as provided in subsection (b) of this section, the Board may not issue a license that has an off-sale privilege to:
(1) an establishment commonly known as a chain store, supermarket, or discount house; or
(2) a franchisor, franchisee, or concessionaire of the establishment.
(b) An establishment described in subsection (a) of this section that held a license on July 1, 1973:
(1) may continue to hold the license; and
(2) at the discretion of the Board, may change the class of the license.