(a) If indebtedness is incurred with regard to the acreage to which the cranberries are attributed, and on which a sales history is established, the sales history holder may transfer or assign the sales history solely as security for the loan. During the existence of such indebtedness no further transfer or assignment of sales history by the sales history holder shall be recognized by the committee unless the lender agrees thereto: Provided, That a copy of such loan agreement or assignment shall be filed with the committee before any right expressed therein, with regard to the sales history, shall be recognized by the committee under this paragraph (a).

(b) This regulation shall not in any way be construed to affect the right of the Secretary of Agriculture to amend, modify or terminate this regulation, or the marketing order under which it is issued as provided by law.