This is interesting news!
For years US amateur-builts have had no restrictions on their gross weight or number of seats, while Canadian amateur-builts have had those restrictions.
In the 1950s Canadian amateur-built aeroplanes were limited to two seats and 1200 lbs. Over the years the limit has grown and a few years ago was raised to a maximum of 5000 lbs and four seats.
Now with the issuance on 2 April 2009 of a new EXEMPTION FROM SECTION 549.01 OF THE CANADIAN AVIATION REGULATIONS AND CHAPTER 549 OF THE AIRWORTHINESS MANUAL – AIRWORTHINESS STANDARDS - AMATEUR-BUILT AIRCRAFT those restrictions have been specifically lifted. This means that Canadians can now build, import and own amateur-builts of any size and weight.
This applies not just to aeroplanes, but all categories of amateur-builts, including gyroplanes, gliders, helicopters, airships and balloons. There are still maximum empty weights that must be met, but these are in relation to the builder-selected gross weight.