SEC. 3. LOCATION AND BOUNDARIES.
The location and boundaries of the Blackstone Court Historic District shall be as designated on the Blackstone Court Historic District Map, the original of which is on file with the Clerk
of the Board of Supervisors under File 115-87-13, which Map is hereby incorporated herein as though fully set forth.
(Added by Ord. 464-87, App. 11/19/87)
SEC. 4. RELATION TO CITY PLANNING CODE.
(A) Article 10 of the City Planning Code is the basic law governing historic preservation in the City and County of San Francisco.
This ordinance, being a specific application of Article 10, is both subject to and in addition to the provisions thereof.
(B) Except as may be specifically provided to the contrary in this ordinance, nothing in this ordinance shall supersede, impair or modify any City Planning Code provisions applicable to
property in the Blackstone Court Historic District, including but not limited to existing and future regulations controlling uses, height, bulk, lot coverage, floor area ratio, required open
space, off-street parking and signs.
(Added by Ord. 464-87, App. 11/19/87)
SEC. 5. STATEMENT OF SIGNIFICANCE.
The significance of Blackstone Court Historic District is more historical than architectural, though enough physical evidence of past history remains to create a sense of the former place
and time in this unusual mid-block enclave of five structures on a blind alley. The north line of the ally, Blackstone Court, follows the north line of an early trail shown on U.S. Coast
Survey maps of the 1850's and 1860's, a trail that ran from town toward the Presidio, around t