If two or more buildings are located in a single housing complex and the land or attached facilities located in the housing complex (including rights related to the land or facilities) is co-owned by the buildings' owners (or the unit owners, for buildings with exclusively-owned areas), all of those owners together (hereinafter referred to as the "owners of buildings in a housing complex") may organize an association to manage the land, attached facilities, and buildings with exclusively-owned areas that are located within the housing complex; and may hold meetings, establish bylaws, and assign a manager, pursuant to the provisions of this Act.