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SEC. 5. STATEMENT OF SIGNIFICANCE. The Alamo Square Historic District is significant as a continuum of distinguished residential architecture by distinguished architects spanning the period from the 1870's to the 1920's. The towered Westerfield House, the renowned "Postcard Row" with its background of the downtown skyline, and the neighboring streetscapes are as identified worldwide with San Francisco as the cable cars and Coit Tower. With a variety of architectural styles, the District is unified in its residential character, relatively small scale, construction type, materials (principally wood), intense ornamentation (especially at entry and cornice), and use of basements and retaining walls to adjust for hillside sites. Boundaries include the park, its edges, the nearby buildings rated highest on the City's architectural survey, and infill structures for rational planning. Most of the original owner-residents were moderately successful businessmen. A higher than average percentage of the houses were designed by architects, including a virtual cross-section of the City's better professionals. The District has always housed a varied ethnic group. With a high degree of integrity to its original designs, the District clearly serves as a visual reminder of how businessmen lived two to four generations ago. (Added Ord. 324-84, App. 7/6/84) SEC. 6. FEATURES. The exterior architectural features of the said Historic District that should be preserved are described and depicted in the Landmark Preservation Advisory Board's case report with appendix titled "Alamo Square Historic District," adopted January 18, 1984, which is hereby incorporated herein and made a part hereof as though fully set forth. (Added Ord. 324-84, App. 7/6/84) SEC. 7. ADDITIONAL PROVISIONS FOR CERTIFICATES OF APPROPRIATENESS. The procedures, requirements, controls and standards in Sections 1005 through 1006.8 of Article 10 or the City Planning Code shall apply to all applications for Certificates of Appropriateness in the Alamo Square Historic District. In addition, the following provisions shall apply to all such applications; in the event of any conflict or inconsistency between the following provisions and Article 10, those procedures, requirements, controls and standards affording stricter protection to landmarks, landmark site, or the Historic District shall prevail. (a) Character of the Historic District. The standards for review of all applications for Certificates of Appropriateness are set forth in Section 1006.7 of Article 10. For purposes of review pursuant to these standards, the character of the historic district shall mean the exterior architectural features of the Alamo Square Historic District described in Section 6 of this ordinance. (b) Minor Exterior Alterations. A Ce