In order to be classified in the HP district, at least part of the property or one of the structures on the property must be:

    A.    Listed on the inventory of the historical resources element of, or otherwise specifically recognized by, the Alameda County general plan; or

    B.    Designated a Point of Historic Interest or State Historical Landmark, or be eligible for or listed on the National Register of Historic Places, or some state or federal inventory of historical resources; or

    C.    Of special importance due to its historical association, basic architectural merit, its embodiment of a style or special type of construction, or other special character, interest, or value.

    In addition, establishment of any HP district, and regulations adopted therein, shall be consistent with Section 17.20.010, Intent. (Ord. 93-15 § 1: prior gen. code § 8-35.3)