In downstream oil and gas, LPG: A third party that performs conformity assessment activities which includes but [is] not limited to testing, calibration, inspection, certification of management system, persons, products, processes and services, provisions of proficiency testing, production of reference materials, validation and verification [Rule 3, Section 3.13, 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]
