There shall be conspicuously posted and displayed in any premises licensed under this chapter:
(A) The license issued pursuant to this chapter;
(B) Not less than one sign giving notice that no person under the age of 18 years is permitted on the licensed premises unless the premises qualify under § 5.10.130, and in that event not less than one sign giving notice that no person under the age of 14 years is permitted unless accompanied by his or her parent, guardian or other adult person having the legal custody, care and control of the minor.
(`78 Code, § 5.10.150.)