(a)

1. (1) The Arkansas Historic Preservation Program is authorized by Acts 1977, No. 480, as amended by Acts 1983, No. 663, to accept conservation easements.
2. (2) It is the policy of the program to accept easements only on certified historic structures, or properties or sites listed in the National Register of Historic Places.

(b) A "certified historic structure" is a structure that is:

1. (1) Individually listed in the National Register of Historic Places; or
2. (2) Located within the National Register Historic District and certified by the United States Secretary of the Interior as contributing to that district.