Any two or more cities, two or more counties, or any combination of cities and counties may, by resolution or ordinance of their separate governing bodies, establish a regional housing agency by adopting a joint resolution or ordinance declaring that there is a need for a regional housing agency to provide decent, safe, and sanitary housing that is affordable to persons of low and moderate income residing in a multijurisdictional area and that this need would be more efficiently served by the establishment of a regional housing agency.