(a) If any fertilizer in the possession of the consumer is found by the Commissioner to be short in weight, the licensee of such fertilizer shall within 30 days after official notice from the Commissioner submit to the consumer a penalty payment of four times the commercial value of the shortage in weight of the lot.

(b) If any fertilizer offered for sale is found by the Commissioner to be short in weight, the fertilizer shall be returned for reprocessing at the expense of the licensee.