(2) Any special program agreement entered into pursuant to subdivision one of this section shall provide that the obligation of the special program municipality executing such special program agreement to fund or pay the amounts therein provided for shall not constitute a debt of such special program municipality within the meaning of any constitutional or statutory provision and shall be deemed executory only to the extent of moneys available and that no liability shall be incurred by such special program municipality beyond the moneys available for the purpose, and that such obligation is subject to annual appropriation by the appropriate legislative body of such special program municipality.