The term “historic structure” means any structure that is:
A. Listed individually in the National Register of Historic Places maintained by the U.S. Department of Interior or preliminarily determined by the Secretary of the Interior Department as meeting the requirements for individual listing on the National Register;
B. Certified or preliminarily determined by the Secretary of the Interior as contributing to the historic significance of a registered historic district or a district preliminarily determined by the Secretary to qualify as a registered historic district; orf
C. Individually listed on a state or city inventory of historic places pursuant to a historic preservation program that has been certified by the Secretary of the Interior or by an approved state program that has been certified by the Secretary of the Interior.
(Ord. 2370 §12)