The purpose of coordination is to ensure openness, to see that all interested outside parties have the ability to examine the draft standard. Working group members should always examine their coordination lists carefully. NesCom has the right to add entities to your coordination list when your PAR is up for approval, so don't assume that the list you submitted is the final list of coordination bodies that you're going to have to satisfy for approval. Common membership means that there is an individual willing to serve as a conduit of information between the two affected groups. A more formal role can be determined by appointing official liaisons to the affected communities.
Coordination means that the interested parties are informed of the activities of the working group.
It does not mean that they endorse or approve those opinions. The working group, of course, is free to consider any recommendations that the coordination point makes, but they are not obligated to include them. Coordination, however, ensures that the principles of due process and openness are employed throughout the development process. NesCom will not add coordination if you're revising your PAR while you're balloting your standard for approval unless the title, scope, or purpose changes. If you're revising your PAR or submitting a PAR to revise an existing standard, make sure that you either include all of your original PAR coordination or include a justification as to why you're deleting or adding coordination.