All proxy documentation must be received by the Board at its headquarters address at least two weeks before the district convention is scheduled to convene. For the purpose of the initial district convention, all proxy documentation must be forwarded to the Department representative identified in the call for the district convention in a manner that will ensure receipt, at the address specified in the call, at least 72 hours before the district convention is scheduled to convene. The Board, or in the case of the initial conventions the Department representative identified in the call or other representative of the Department, may challenge any proxy vote and disqualify any challenged vote for cause. In the case of duplicate proxy authorizations by any person, only the first authorization, determined by date will be allowed. In the case of duplicate dates, the proxy which is received first will be allowed.
7 C.F.R. §1210.403