California Code, Fish and Game Code - FGC § 855

Regularly employed law enforcement officers of the department may, when authorized by the director, expend such sums as authorized for the purchase of fish, birds, or mammals as evidence, or for expenditures related to the procurement of such evidence, or for expenditures made to investigate other violations of this code without divulging the identity of the employee.

The sums so expended shall be repaid to the law enforcement officer making the expenditure upon claims approved by the director.  The claims, when approved, shall be paid out of the funds appropriated or made available by law for the support of the department.