This project will make the Trial Use document a full Recommended Practice. The present standard was published in March 1998 as a Trial Use Recommended Practice. However, the protocols listed in the document were actually selected by the Task Force in 1995. It has already shown to be a valuable standard and is being widely used in the industry. The protocols listed in the existing Trial Use Recommended Practice IEEE 1379 have proven to be very useful and should be retained as an industry recommended practice. The intent is to re-validate the existing document and delete the words "Trial Use". Revision Standard - Inactive-Withdrawn. A uniform set of guidelines for communications and interoperations of remote terminalunits (RTUs) and intelligent electronic devices (IEDs) in an electric utility substation is provided. Amechanism for adding data elements and message structures to this recommended practice isdescribed.