Stations installed at custody transfer points and whose equipment sets and measuring instruments must comply with Colombian standards or, failing that, with those of AGA or ANSI, established for the manufacture, installation, operation and maintenance of equipment and instruments. These stations may be Inlet, Outlet or Between Transporter Stations. (Source: R. CREG-041-2008; Art. 2; R. CREG-071-1999; Chap. I. Item 1.1).