Category is defined only by MTOW and stall speed 1:
MTOW: 544 kg (1,200 pounds)
VS0: 39 knots (45 mph) IAS, or less at MTOW
There is also one important limitation - passengers are not allowed, although the plane can have two seats. Only two pilots can fly together or pilot with instructor.
References
[1] Review of Canadian Aircraft Categories
Example of basic ultralight
By its specs., Fisher Flying Products Dakota Hawk should fit into this category.
These airplanes might be Basic ultralight aircraft category eligible
Basic ultralight aircraft - Canadian category
