Notwithstanding the provisions of Sections 29400, 29402, and 29403, the local protection program for the area that is located east of State Highway Route 680, southeast of State Highway Route 80, south of State Highway Route 12, and outside the marsh, and that is also located within the City of Fairfield, or within the sphere of influence of the City of Fairfield as such sphere of influence existed on January 1, 1977, may contain only (1) zoning ordinances implementing the land use designations of the Cordelia Area General Plan Diagram as adopted by the City of Fairfield on September 17, 1974, and which is a part of the Central Solano County General Plan and (2) ordinances controlling grading, erosion, sedimentation, runoff, and creekside development that meet the requirements of subdivisions (h) and (i) of Section 29401.