(a) The Secretary may at any time terminate the provisions of this part.

(b) The Secretary shall terminate or suspend the operations of any or all of the provisions of this part whenever it is found that such provisions do not tend to effectuate the declared policy of the Act.

(c) The Secretary shall terminate the provisions of this part at the end of any fiscal period whenever it is found that such termination is favored by a majority of producers who, during a representative period, have been engaged in the production of pistachios: Provided, That such majority has, during such representative period, produced for market more than fifty percent of the volume of such pistachios produced for market, but such termination shall be announced at least 90 days before the end of the current fiscal period.

(d) Within six years of the effective date of this part the Secretary shall conduct a referendum to ascertain whether continuance of this part is favored by producers. Subsequent referenda to ascertain continuance shall be conducted every six years thereafter. The Secretary may terminate the provisions of this part at the end of any fiscal period in which the Secretary has found that continuance of this part is not favored by a two thirds (2⁄3) majority of voting producers, or a two thirds (2⁄3) majority of volume represented thereby, who, during a representative period determined by the Secretary, have been engaged in the production for market of pistachios in the production area. Such termination shall be announced on or before the end of the production year.

(e) The provisions of this part shall, in any event, terminate whenever the provisions of the Act authorizing them cease.