(a) Any owner or driver of a vehicle, not licensed in accordance with the provisions of this chapter, or of a vehicle, the license of which has been suspended or revoked, who engages in the business of a taxicab or attempts to engage in such business, or solicits for hire passengers upon the streets, shall be fined not more than one hundred dollars ($100.00) or imprisoned not more than thirty days, or both.
(b) Any person, not having been duly licensed as a taxicab driver, or any person whose license as such a driver has been revoked, or any person whose license has been suspended and who during the time of the suspension drives a taxicab for hire upon the streets, shall be fined not more than one hundred dollars ($100.00), or imprisoned not more than thirty days, or both.
(c) In addition to the fine, imprisonment or both, authorized by this chapter, any licensee be subject to the suspension or revocation of his license upon conviction for any violation of this chapter. The Director of Public Safety may in his discretion, and shall upon the recommendation of the Chief of Police, suspend or revoke a license granted under any provision of this chapter, pending or in advance of the criminal prosecution of the licensee. In case of the refusal to issue a license or the revocation of a license by the Director, the applicant or licensee may appeal from the order in the manner provided.