The Secretary is authorized to take such action as he determines to be necessary to facilitate the transition from the program currently in effect to the program provided for in this part. Notwithstanding any other provision of this part, such authority shall include, but shall not be limited to, the authority to exempt all or a portion of the wheat or food products made therefrom in the channels of trade on the effective date of the program under this part from the marketing restrictions in subsection (b) of section 1379d of this title, or to sell certificates to persons owning such wheat or food products at such prices as the Secretary may determine. Any such certificate shall be issued by Commodity Credit Corporation.