California Code, Government Code - GOV § 25538.1

In counties containing a population of 6,000,000 or more, the board of supervisors may, by ordinance, authorize any county officer as is deemed appropriate to take or perform any or all acts or actions permitted or required of the board by this article and by subdivision (a) of Section 8355 andSection 8357 of the Streets and Highways Code with respect to the sale or lease of any real property of the county. The authorization shall include detailed procedures governing the county officer in the exercise of that authority.These sales and leases shall be subject to final approval by the board of supervisors.