No person shall engage in sidewalk vending on any sidewalk in the City of Phoenix, except as specifically authorized by a license agreement entered into between that person and the City Manager on behalf of the City. (Ord. No. G-1600, § 4; Ord. No. G-3700, § 5; Ord. No. G-3836, §§ 2, 6; Ord. No. G-4586, § 1, 2004)