The spareribs shall be as described in Item No. 416, except the sternum and the ventral portion of the costal cartilages shall be excluded along with the flank portion. The breast shall be removed at a point which is dorsal to the curvature of the costal cartilages. If specified by the purchaser the diaphragm shall be excluded. Purchaser may also specify that the spareribs be separated into two approximate equal portions by a lengthwise cut.