The ISU has released several Communications pertinent to synchronized skating in the past few weeks. At this time of year, revisions are published as quickly as new documents come out, so visit the ISU website often. You can avoid costly mistakes by ensuring you are following the most current set of rules as you design and refine your choreography.
Communication 2182 replaces 2159. This document explains all the things you need to do to get credit for the various difficulty levels. Think of it like a checklist of the requirements you need to meet to get a level called.
Scale of Values
Major Changes from Congress
The significant changes accepted at Congress are outlined in Communication 2181. These pertain to the Special Regulations and Technical Rules, which should be updated in the coming weeks or months. You can read more about what that document is used for in this post.
International Novice Competitions
Communication 2184 covers guidelines for international Novice competitions, and replaces Communication 2024.