(1) By a consolidated department;
(2) By jointly providing for administrative officers;
(3) By means of facilities or equipment jointly constructed, owned, leased or operated;
(4) By one of the parties for any other party;
(5) By an intergovernmental entity created by the agreement and governed by a board or commission appointed by, responsible to and acting on behalf of the units of local government that are parties to the agreement; or
(6) By a combination of the methods described in this section. [Amended by 1953 c.161 §2; 1963 c.189 §1; 1967 c.550 §4; 1991 c.583 §1]