Section 92. Sections eighty-five to ninety-one, inclusive, shall neither apply to seed or grain not intended for sowing purposes, nor to seed for sowing purposes in storage in, or consigned to, a seed cleaning or processing establishment for cleaning or processing; provided, that the invoice or labeling accompanying any shipment of seed bears the statement ''seeds for processing'', and provided that any labeling or other representation made with respect to the uncleaned or unprocessed seed shall be subject to sections eighty-four to one hundred, inclusive.