(a) Except as provided in subdivision (b) and in Sections 7924.510, 7924.700, and 7929.610, this division does not require disclosure of the contents of real estate appraisals or engineering or feasibility estimates and evaluations made for or by a state or local agency relative to the acquisition of property, or to prospective public supply and construction contracts, until all of the property has been acquired or all of the contract agreement obtained.
(b) This section does not affect the law of eminent domain.