The Racing Rules of Sailing (RRS) are updated every 4 years. Most clubs and every racing sailor, coach, official and regatta organizer should own a Rule Book for ready reference.
The 2017-2020 version will be in force effective January 1, 2017.
Download the RRS in pdf format from Sailing.org
Did you know that World Sailing has an app for that? Search Google Play or the App Store for World Sailing.