I’ve created PR #431 : This PR adds a description and a usage requirement to the Command-ID type. Responds to item 3 in issue #388 . Assuming no objections are raised this PR will be merged on or after 27 December, per our interim lazy consensus procedure. Please review, and respond prior to 27 December if you disagree. Creating this PR led to a related question: the Message Headers type defined in LS section 3.2 includes a request_id of type String which is used in the same way / manner as the command_id in a Command message ( section 3.3.1 ); should the request_id type be changed to Command-ID ? Dave __________________ David Lemire IA Systems Engineer Mission Technologies (301) 575-5190 (o) (240) 938-9350 (m) HII.com