Full IRC rule text for appropriate year, including measurement defnitions. Most links are to PDF documents.
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: