For the purpose of administering the terms of this Part, each marketer shall deduct from the prices otherwise to be paid to producers and cooperative associations (except a collecting cooperative which has arranged to make the reports and payments with respect to the milk of producers) an amount to be determined by the commissioner and not to exceed $.05 per hundredweight on all pool milk received from producers to be paid to the commissioner, as trustee. Such funds shall not be deemed to be State funds.