Full IRC rule text for appropriate year, including measurement defnitions. Most links are to PDF documents.
IRC 2017 Rule changes summary (English & French)
IRC 2015 Full rule text (English)
IRC 2015 Full rule text (French)
IRC Simplified Rules (on rorcrating.com)
IRC 2014 Full rule text (English)
IRC 2013 PDF Portfolio - with links to ERS and RRS definitions.
You will need Adobe Reader 9 to read the PDF Portfolio, download it here: