Each taxicab shall bear on the outside of each front door, in painted letters not less than two inches nor more than six inches in height, the name of the owner and, in addition, may bear an identifying design approved by the city clerk. No vehicle covered by the terms of this chapter shall be licensed whose color scheme, identifying design, monogram or insignia to be used thereon shall, in the opinion of the city clerk, conflict with or imitate any color scheme, identifying design, monogram or insignia used on a vehicle or vehicles already operating under this chapter, in such a manner as to defraud the public; provided further, that if, after the color scheme, identifying design, monogram or insignia thereof is changed so as to be, in the opinion of the city clerk, in conflict with or imitate any color scheme, identifying design, monogram or insignia used by any other person, owner or operator, in such a manner as to be misleading or tend to deceive the public, the license of or certificate covering such taxicab or taxicabs shall be suspended or revoked. (Prior code § 22-1-3)