2.5. For the purposes of this division, the following are partner bodies:(1) in every case, each municipality whose territory is situated within the territory of the responsible body;
(2) in the case of the statement of a metropolitan community, each regional county municipality all or part of whose territory is situated within the territory of the metropolitan community; and;
(3) in the case of the statement of a regional county municipality all or part of whose territory is situated within the territory of a metropolitan community, that metropolitan community.