In downstream oil & gas, LPG: set of policies, procedures or requirements used as a reference against which audit evidence is compared (footnote 2: ISO19011) [Section 3.3, 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]
