(a) For the purpose of aiding in the planning, undertaking or carrying out of an urban renewal project and related activities authorized by this act, any public body may, upon such terms, with or without consideration, as it may determine: (1) dedicate, sell, convey or lease any of its interest in any property or grant easements, licenses or other rights or privileges therein to an urban renewal agency; (2) incur the entire expense of any public improvements made by such public body in exercising the powers granted in this section; (3) do any and all things necessary to aid or cooperate in the planning or carrying out of an urban renewal plan and related activities; (4) grant or contribute funds to an urban renewal agency and borrow money and apply for and accept advances, loans, grants, contributions, and any other form of financial assistance from the federal government, the state, county or other public body, or from any other source; (5) enter into agreements (which may extend over any period, notwithstanding any provision or rule of law to the contrary) with the federal government, an urban renewal agency or other public body respecting action to be taken pursuant to any of the powers granted by this act, including the furnishing of funds or other assistance in connection with an urban renewal project and related activities; and (6) cause public buildings and public facilities, including parks, playgrounds, recreational, community, educational, water, sewer or drainage facilities, or any other works which it is otherwise empowered to undertake to be furnished; furnish, dedicate, close, vacate, pave, install, grade, regrade, plan, or replan streets, roads, sidewalks, ways or other places; plan or replan, zone or rezone any part of the public body or make exceptions from building regulations; and cause administrative and other services to be furnished to the urban renewal agency. If at any time title to or possession of any urban renewal project is held by any public body or governmental agency, other than the urban renewal agency, which is authorized by law to engage in the undertaking, carrying out, or administration of urban renewal projects and related activities (including any agency or instrumentality of the United States of America), the provisions of the agreements referred to in this section shall inure to the benefit of and may be enforced by such public body or governmental agency.