163.355  Finding of necessity by county or municipality.--No county or municipality shall exercise the authority conferred by this part until after the governing body has adopted a resolution finding that:

(1)  One or more slum or blighted areas, or one or more areas in which there is a shortage of housing affordable to residents of low or moderate income, including the elderly, exist in such county or municipality; and,

(2)  The rehabilitation, conservation, or redevelopment, or a combination thereof, of such area or areas, including, if appropriate, the development of housing which residents of low or moderate income, including the elderly, can afford, is necessary in the interest of the public health, safety, morals, or welfare of the residents of such county or municipality.