When two or more of such cities or counties, by ordinance of each city and by resolutions of the boards of county commissioners enter into agreements providing for such joint planning cooperation, there may be established a joint planning commission for the metropolitan area or region comprising that portion of the areas of planning jurisdiction of the cities or counties cooperating jointly as shall be designated by the joint ordinances and resolutions. Such a joint planning commission for the metropolitan area or region may be empowered to carry into effect such provisions of state law relating to planning which are authorized for such joining cities or counties and which each may under existing laws separately exercise and perform.
Any city or county, whenever the governing body of the city or the board of commissioners of the county deems necessary, may join and cooperate in two or more metropolitan area or regional planning commissions. Any regional or metropolitan planning commission in existence on the effective date of this act shall continue in existence, but shall be governed by the provisions of this act.
K.S.A. 12-744