Cal. Gov. Code § 25549.8
For the purposes of receiving proposals for the joint occupancy of a building to be constructed on property belonging to a county or city and county, the board of supervisors shall, in a regular open meeting, adopt a resolution declaring its intention to consider the proposals. The resolution shall describe the proposed site on which the building to be jointly occupied is to be constructed in such a manner as to identify the site, shall specify the intended use of that portion of the building which is to be occupied by the county or city and county, and shall fix a time not less than 60 days thereafter for a public meeting of the board to be held at its regular place of meeting, at which meeting the board shall receive all plans or proposals submitted.
Ca. Gov. Code § 25549.8