(a) The words closed package mean a crate, box, carton or other container, the contents of which cannot be adequately inspected without opening.

(b) The word lettuce means iceberg type lettuce.

(c) The words good delivery standards mean, in connection with the use of the official lettuce grades, shipments of lettuce enroute or at destination of lettuce and at retail sale may contain an average of not more than three percent condition defects, including not more than two percent decay affecting any portion of the head exclusive of wrapper leaves in excess of the destination tolerances provided for the applicable grade in the official New York or U. S. standards for grades of lettuce. (For example, the No. 1 grade provides a 12 percent tolerance for damage at destination. If a lot contains five percent damage by permanent grade factors, seven percent of the tolerance can be applied to damage by condition factors. The additional three percent tolerance would then allow a total of 10 percent damage by condition factors in this shipment at retail destination and at retail sale.)

(d) The words fairly uniform in size mean that not more than 10 percent, by count, of the heads in any container may vary appreciably in size from the standard size head for the count pack.

(e) The words excessively tightly packed mean that heads are packed so tightly as to cause distortion or crushing of the heads or breaking of the midribs. The packing of 24 heads of 18 size in a standard cardboard lettuce container would result in an excessively tight pack.