 The Register has continued to grow through two reorganizations, one in the 1970s and one in 1980s and in 1978 the NRHP was completely transferred away from the National Park Service, it was again transmitted to the NPS in 1981.In April 1966, six months before the National Register of Historic Places was created, the National Park Service's history research programs had been centralized into the office of Robert M. Utley, NPS chief historian, in Washington, D.C., as part of an overall plan dubbed "MISSION 66.