Sailing Instructions for Classes 1-6 can be downloaded as a PDF from HERE. (IRC 1, IRC 2, IRC 3, Cruising, Platu, Ocean Multihulls)
Sailing Instructions for Classes 8, 9, 10 and 12 can be downloaded as a PDF from HERE. (Open Beach Multihulls, Single-Handed Monohull Dinghy, Double-Handed Monohull Dinghy, Thailand Optimist National Championships)
Sailing Instructions for Class 11 can be downloaded as a PDF from HERE. (IOM Class RC Yachts)