This is the official Rulebook of the USAWA. It contains general rules and the rules of the individual official USAWA lifts. It also contains the USAWA Bylaws. Hard copies may be purchased in the USAWA online store for $30 plus shipping. The Rulebook is free to download as a pdf. However, the Rulebook file is large (7 MB) and system performance may be slow depending on your connection speed.
USAWA Rulebook (PDF): RULEBOOK 7th Edition