14. For the purposes of the performance by an inspector of his functions under the Act or these Regulations relating to inspection, testing, passing as fit for use for trade and stamping of any measuring equipment a person submitting such equipment to an inspector or who an inspector has reasonable cause to believe has possession of such equipment for use for trade shall, if requested, provide for the inspector’s use such test liquid and other equipment as the inspector may reasonably require; and any test liquid so provided shall be returned to the person in question or be placed in another suitable receptacle reasonably convenient for the purpose and nominated and provided by the proprietor or person in charge of the equipment.