14. For the purposes of the performance by an inspector of his functions under the Order or these Regulations relating to inspection, testing, passing as fit for use for trade and stamping of any capacity measure, a person submitting such a measure to an inspector or who an inspector has reasonable cause to believe has possession of such a measure for use for trade shall, if requested, make available for the inspector’s use such material as the inspector may reasonably require, and any material so made available shall be returned to the person in question.