In downstream oil and gas, LPG: the provision of impartial third-party attestation that fulfillment of specified requirements have been demonstrated (footnote 19: ISO/IEC 17065) [Section 3.43, Rule 3, DTI Department Administrative Order No. 22-11, Series of 2022, The New Technical Regulation Concerning the Mandatory Certification of Liquefied Petroleum Gas (LPG) Pressure Vessels, Systems, Services and Ancillary Products]