The Commission may, upon the advice of the commodity board serving under any agreement or order and without opportunity for public hearing or referendum as herein provided:

(a) Amend any marketing agreement or order as to any minor matter or wording which does not substantially alter the provisions and intention of such agreement or order;

(b) Suspend any such agreement or order or term or provision thereof for a period of not to exceed one year, if the Commission upon the advice of the commodity board, finds that such suspension will tend to effectuate the declared policy of this chapter; provided, that any suspension of such agreement or order shall be effective only until the end of the then current marketing season.