California Code, Penal Code - PEN § 1205.3

In any case in which a defendant is convicted of an offense and granted probation, and the court orders the defendant either to pay a fine or to perform specified community service work as a condition of probation, the court shall specify that if community service work is performed, it shall be performed in place of the payment of all fines and restitution fines on a proportional basis, and the court shall specify in its order the amount of the fine and restitution fine and the number of hours of community service work that shall be performed as an alternative to payment of the fine.