Certainly there's a manual. Assisting officers are given a manual, and I've read the manual. There is a legal officer who's available, but a suggestion to make the summary trial process more fair to the member might be that all non-serious charges also be referred to legal counsel for advice. Right now there's no obligation on a CO to consult with their legal adviser in respect to non-serious matters.
On February 16th, 2011. See this statement in context.