All first handlers shall remit such assessment to the Washington state apple advertising commission, when such assessment has been withheld for apples, and such remittance shall be made in the same manner and time as assessments due the said Washington state apple advertising commission for apple advertising assessments; and to the Washington state fruit commission, when such assessment has been withheld for any other tree fruit, including winter pears, and such remittance shall be made in the same manner and time as assessments due the said Washington state fruit commission.