Cal. Sts. & Hy. Code § 2458
If a construction contract has not been awarded within two years after an allocation for construction costs, the commission may order the allocation canceled and those funds shall revert to the fund set aside for purposes of this chapter. All or any part of an allocation for preconstruction costs may be canceled and those funds shall revert to the fund set aside for purposes of this chapter upon a finding that insufficient progress is being made to complete the project. Where an allocation is canceled pursuant to this section, the local agency shall reimburse the fund set aside for purposes of this chapter the portion of the allocation that is not reverted as set forth in this section. The department shall determine, with the local agency, as to the time of repayment.
Ca. Sts. and High. Code § 2458