All assessments levied and imposed under and pursuant to the provisions of this chapter shall be paid to the commission by the person, either grower or dealer, by whom the alfalfa seed or clover seed is first handled in the primary channels of trade and shall be paid at such times as the commission may by rule prescribe, but not later than sixty (60) days from the date on which the grower received payment for the alfalfa seed or clover seed. If the party first handling the alfalfa seed or clover seed in the primary channels of trade is a person other than the grower he may charge against or recover from the grower of such alfalfa seed or clover seed the full amount of any assessment levied and imposed under this chapter.