Lands identified to be located within a Hillside Area based on the latest BOE Basic Grid Map A-13372, per Section 91.7003 of the Building Code. This map is on file in the official City documents located in the Office of the City Clerk in the Council File No. 121222 Sup. #1. An area where grading is only allowed in conjunction with an approved subdivision, a building permit or where the site has already been developed with an existing main building. Other requirements for grading also apply, including haul routes, postings, etc.