Except as otherwise provided by the Act the share proportionate to the State's contribution toward a project under the Act, of any money in the State School Building Fund of a school district which remains an unencumbered balance in excess of the amount required to liquidate all approved costs or expenditures necessary to complete a project shall be returned by the district to the State within sixty (60) days after notice of completion of the construction project has been filed or the project has been accepted or occupied by the governing body of the school district, whichever first occurs.
Cal. Code Regs. Tit. 2, § 1863.19