[§201G-100] Regulations, effective when. No ordinance or laws enacted by the council of any county regulating traffic within the projects of the corporation within the county, shall be valid or effective, unless prior thereto, the corporation has entered into a written contract with the county absolving the county from any and all responsibility or liability for the construction, maintenance, and repair of any streets, lanes, alleys, or highways or street markers, traffic signs, or signal devices within the projects of the corporation. [L 1997, c 350, pt of §2]