California Code, Water Code - WAT § 8970

Whenever any warrant drawn by the Controller upon the State Treasurer as provided in this chapter has been presented to the State Treasurer and not paid for want of funds and has not been registered by the State Treasurer and bears interest as provided in this chapter, the Controller shall at any time, on presentation of the warrant to him for that purpose, certify on the warrant, over his signature, the amount of interest accrued thereon to that date, specifying the date.