37. Regulations 38 to 42 below apply to contents gauging systems.
38.—(1) No contents gauging system shall be tested unless it is installed ready for use and complete with all its parts and ancillary equipment concerned in the operations of measurement and delivery as described in the certificate of approval.
(2) Every contents gauging system shall be tested by an inspector under the approved working conditions, with a liquid fuel which it is designed to deliver, or with a liquid specified in the certificate of approval.
39. 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 a contents gauging system, a person submitting such a system to an inspector or who an inspector has reasonable cause to believe has possession of such a system for use for trade shall, if requested, provide for the inspector's use such liquids as the inspector may reasonably require, and any liquids so provided shall be returned to the person in question.
40. An inspector shall test a contents gauging system using—
(a)local standards of capacity; or
(b)a reference meter; or
(c)other equipment, being measures of capacity forming part of a fixed installation or being mounted on a vehicle or trailer, which has been tested in a manner which the inspector considers suitable, and adjusted, within the last twelve months, so as not to have any apparent error.
41.—(1) An inspector may open any locked or sealed container for the purpose of testing a contents gauging system or for the return of liquid withdrawn during testing, and any liquid so withdrawn shall, upon conclusion of the test, be forthwith returned to the container from which it was withdrawn if the inspector is of the opinion that it is practicable and desirable so to do and the proprietor or person in charge of the equipment does not object; otherwise, it shall 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.
(2) The inspector, if requested, shall give to the proprietor or person in charge of the said equipment a signed and dated statement of the quantity of such liquid withdrawn from the container and returned or placed as aforesaid.
42. An inspector shall securely re-fasten any container opened under Regulation 41(1) above immediately after the conclusion of the test and the return of the liquid withdrawn during testing or its placing in another receptacle; and for this purpose he shall replace any seal or link broken by him in opening the said container with a seal upon which he shall affix the stamp.