4 The Commodity Board and the Board are each authorized, in relation to the powers granted to them under section 3 with respect to the marketing of vegetables in interprovincial and export trade, to make orders fixing, imposing and collecting levies or charges from persons referred to in section 3 who are engaged in the marketing of vegetables and for such purpose classifying such persons into groups and fixing the levies or charges payable by the members of the different groups in different amounts and the Commodity Board and the Board may use such levies or charges for their purposes, including the creation of reserves, the payment of expenses and losses resulting from the sale or disposal of vegetables and the equalization or adjustment among producers of vegetables of moneys realized from the sale thereof during such period or periods of time as the Commodity Board or the Board may determine.
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