Social Security is working on an updated version of its Best Practices for Representatives at the Appeals Council (link opens PDF of the new draft). This draft is much more extensive than the current version, and is worth reviewing.
Thanks to NADR for circulating this new draft. If you have comments on the draft, they can be emailed to Patricia.Jonas@ssa.gov.
Since we are discussing the Appeals Council, here is a copy of the always helpful Appointed Represesentative Guide to Requesting Appeals Council Review (link opens 2-page PDF)