(1) After a city council has by ordinance, a board of county commissioners has by ordinance and resolution, or a city council and board of county commissioners have by ordinance and resolution created a planning board, the governing bodies represented upon such board may appropriate funds to carry out the duties of the planning board.
(2) When a planning board has been created by agreement of more than one governmental unit, the governing bodies of the governmental units which have created the board shall agree upon the proportion of expenditures to be borne by each such unit and may budget and appropriate the funds necessary for the respective shares thus agreed upon.