Neb. Rev. Stat. § 71-1585

After a regional housing agency has been established, any additional city or county may elect to participate as a member of such regional housing agency upon adoption of a resolution or ordinance to such effect containing, in substance, the findings provided in section 71-1581 , if a majority of the existing commissioners of such regional housing agency and all participating political subdivisions, by action of their respective governing bodies, consent to such additional member or members.