Whoever violates any provision of this article, whether as principal, agent or employee, for which violation no other penalty is prescribed, shall be punished as prescribed by Section 101.99; provided, that such person shall be deemed guilty of a separate offense for each month during any portion of which any violation of this article is committed, continued or permitted. The existence of any advertising copy on any outdoor advertising structure or outdoor advertising sign or advertisement inside incorporated areas shall constitute prime facie evidence that such outdoor advertising structure or outdoor advertising sign or advertisement was constructed, erected, operated, used, maintained or displayed with the consent and approval and under the authority of the person whose goods or services are advertised thereon. (1967 Code §15-9)