Unless another penalty is expressly provided by the Code of Ordinances for any particular provision, section or chapter, any person failing to perform a duty, or obtain a license required by, or violating any provision of the Code of Ordinances, or any rule or regulation adopted herein by reference shall, upon conviction, be subject to a fine of not more than five hundred dollars ($500.00) or imprisonment not to exceed thirty (30) days.
(Code of Iowa, Sec. 364.3[2])