 The SHPOs help make the management of the National Register and its affiliated incentive programs possible, with the states assuming much of the responsibility for monitoring rehabilitation construction on Registered Historic Places.The result is that the NPS sets standards and priorities, administers the grants program, and maintains quality control, while the SHPO carry out the work as agents of the federal government.The National Register of Historic Places has grown considerably from its beginnings as legislation in 1966.