1. Notwithstanding the provisions of section 100.330 or any other provision of law to the contrary, beginning August 28, 2000, the number of commissioners in any city not within a county shall be five; provided that, by the process of attrition the number of commissioners shall be reduced from fifteen to five by the expiration of the terms of currently serving commissioners and nonreplacement of any vacancies. Commissioners shall be appointed for a term of four years each. All commissioners shall be appointed by the mayor of any such city, shall be taxpayers of the city, and shall have resided in the city for five years immediately prior to their appointment. All vacancies shall be filled by the mayor of the city for the unexpired term, subsequent to the time the number of commissioners is reduced to five by attrition.

2. At any time, the governing body of a city not within a county may adopt a plan of consolidation to combine the planned industrial expansion authority of such city with the land clearance for redevelopment authority of such city.