Any two or more counties may jointly and cooperatively undertake programs to promote the growth and development of the industrial payroll of the area or region in which such counties are located, and any county may likewise cooperate with political subdivisions of the county and with other public or private nonprofit agencies to achieve the purposes set forth in this act,¹ including the development of intergovernmental public trusts organized under Title 60 of the Oklahoma Statutes, whose membership shall represent equally the counties and political subdivisions in the area or region.