An Act to achieve the fullest cooperation and coordination of activities among the levels of government in order to improve the operation of our federal system in an increasingly complex society, to imjprove the administration of grants-in-aid to the States, to permit provision of reimbursable technical services to State and local government, to establish coordinated intergovernmental policy and administration of development assistance programs, to provide for the acquisition, use, and disposition of land within urban areas by Federal agencies in conformity with local government programs, to provide for periodic congressional review of Federal grants-in-aid, and for other purposes