Radiography shall be performed with a technique of sufficient sensitivity to display the designated hole-type IQI image and the essential hole, or the essential wire of a wire-type IQI. The radiographs shall also display the IQI identifying numbers and letters. If the designated hole-type IQI image and essential hole, or essential wireof a wire type IQI, do not show on any film in a multiple film technique, but do show in composite film viewing, interpretation shall be permitted only by composite film viewing.