“Restoration” is one of the four treatment options specified in the Secretary of the Interior’s standards for the treatment of historic properties and is defined by the Secretary of the Interior as the act or process of accurately depicting the form, features, and character of a resource as it appeared at a particular period of time by means of the removal of features from other periods in its history and reconstruction of missing features from the restoration period. The limited and sensitive upgrading of mechanical, electrical, and plumbing systems and other code-required work to make properties functional is appropriate within a restoration project. (Also see the City’s HPP Section 5.0, Design Guidelines – Secretary of the Interior Standards.) (Ord. 3196 § 3, 2011).