/industries/oilandgas/b/oil-gas-blog/posts/api-manual-of-petroleum-measurement-standards-updatesPart 2 of Marc Buttler ‘s Emerson Exchange conference presentation was on regulatory and standards changes in US onshore custody transfer and fiscal measurement. API MPMS Ch. 4.8 – Operation of Proving Systems has recently opened to provide clarificationen-USTelligent Community 13