As part of the Congressional Act, Section 101 implemented the designation of the State Historic Preservation Program.
In the 1970s, these SHPOs experienced a growth in power as they became more organized, efficient and professional, and clarified their relationships with NPS.
The SHPO continued to gain an increasingly specific role, taking on the position of the advising consultant for the Section 106 review process.
In 1980 with the amendment to the NHPA, the SHPO's exact duties were finally identified, defining its role, which remains today.
[14] As a result of these differences, states have expanded and/or specialized their SHPO purposes and created private organizations.
Alaska's Coastal Management Program is a private organization, created by the state to regulate agencies to acknowledge environmental and cultural resources within the Alaskan Coast and protect them.