Government Code § 16367.71
ARTICLE 1.7. Federal Block Grant Funds
Notwithstanding any other provision of law, whenever a warrant distributed pursuant to Section 16367.5 or 16367.6 remains unclaimed, or the claimant cannot be found, for a period of six months following its disbursement, the face amount of the unclaimed warrant shall revert and be credited to the fund against which the warrant was drawn.