7 CFR §28.18

Not more than one request for a Form A determination, or a Form C determination, or a Form D determination of the same cotton, except a request for a review determination, shall be filed by the same owner within any 30-day period. Any subsequent request shall be accomplished by redrawn samples and the Area Director may require that any Form A or Form D memoranda, Form C certificates, or other classification data previously issued by a Classing Office with respect to samples purporting to represent the same cotton shall be returned before such redrawn samples are classed.