In the case of San Francisco Bay, the conservancy may undertake restoration of an area only upon formal request by resolution of a local public agency or the bay commission, except that, with respect to lands within Contra Costa County, such restoration or other action may be undertaken only upon the formal request by resolution of the local public agency having jurisdiction over such lands; provided, however, that a restoration plan for the area has been prepared by the conservancy and approved in accordance with Section 31208.5.