I don't have an interpretation bulletin specifically for a public office holder. Actually, there is one. It doesn't specifically say “public office holder”, but it is if you are communicating with a public office holder, which would include members of Parliament.
The one document that I think might be of interest, which my office is finalizing and that came from doing some of my outreach activities, is “The Ten Things You Should Know About Lobbying”. We thought that would be useful for parliamentarians. That's the document we're currently working on, which would hopefully be something like this that you can easily have.