The Washington state apple advertising commission is hereby designated to collect assessments due and payable to the Washington tree fruit research commission on processing apples as defined in RCW 15.24.010(6). The Washington tree fruit research commission will prescribe the official form to be used by the Washington apple advertising commission and all dealers, handlers and processors handling processing apples in the collection and payment of such assessments. The Washington state apple advertising commission shall determine the manner and time of payment of such assessments in conformance with its system of assessment collections. The remittance of such assessments collected on processing apples shall be made by the Washington apple advertising commission to the Washington tree fruit research commission, in conformance with WAC 16-560-050.