(a) Every person holding any state license authorizing the conduct of any business, trade or vocation shall expose such license in a conspicuous manner in the principal office or place of business of such person.
(b) Every individual, every member of a firm or association of persons and every director and officer of a corporation holding a license under this part and failing to comply with this section shall be fined not more than $100.
(c) None of the provisions of this section shall be deemed or taken to repeal the penalties imposed by any statute of the State for the failure of any particular class of licensees.