Cal. Food & Agric. Code § 56704

The money deposited in the products fund shall only be used to pay for farm products grown or produced within this state which have not been otherwise paid for. However, claims made against the fund may include charges for services which by custom of the trade are incidental to the sale and generally accepted as being included in the purchase price. Any moneys remaining in the products fund after all the claims have been settled, discharged, or paid in any year shall be credited to the funds to be used in any other year, and the director, in view of this, shall adjust the fees provided for under Section 56703 in accordance with the provisions of that section.