7 C.F.R. § 958.56
(a) The committee, with the approval of the Secretary, may prescribe adequate safeguards to prevent onions shipped,
(2) To commercial dehydrators for processing by such dehydrators into dehydrated onion products,
from entering channels of trade for other than the purpose authorized therefor.
(b) The committee, with the approval of the Secretary, may also prescribe rules and regulations governing the issuance, and the contents, of Certificates of Privilege if such certificates are prescribed as safeguards by the committee. Such safeguards may include requirements that: