Nothing contained in this article shall be construed to require the payment of an ad valorem tax prior to the purchase of a license plate for any motor vehicle:
(Ga. L. 1966, p. 517, § 18; Ga. L. 1967, p. 91, § 3; Code 1933, § 91A-1910, enacted by Ga. L. 1978, p. 309, § 2.)