The original sample from each bale to be classified shall be delivered to the Marketing Services Office with which the classification request was filed, at its classification room. If there is no Marketing Services Office at the point where the cotton is sampled, the supervisor of cotton inspection or the exchange inspection agency shall forward the samples to the proper Marketing Services Office. No samples covered by pending classification requests which are ready for delivery as provided for herein shall be withheld from such delivery except as authorized in writing by the Area Director or the Director.