All licenses must be kept and posted in the following manner:
(A) Any licensee transacting and carrying on a business at a fixed place of business in the city shall keep the license posted in a conspicuous place upon the premises where such business is carried on; and
(B) Any licensee transacting and carrying on a business, but not operating at a fixed place of business within the city, shall keep the license upon his person at all times while transacting and carrying on such business.
('81 Code, § 5.04.250) Penalty, see § 110.99