If any person or agency purchases or contracts for any supplies, materials, equipment or services contrary to the provisions of this chapter, such purchase order or contract shall be void and of no effect. The head of the agency making such a purchase transaction shall be personally liable for the amount of such purchase order or contract, and, if already paid out of city funds, the amount thereof may be recovered in the name of the city in an appropriate action therefor. It is unlawful for any agency to split its requirements for supplies, material, equipment or services to willfully evade any requirement of this chapter. (Ord. 414 § 11, 2022; Ord. 42 § 1, 1990)