Technically speaking, assisted suicide is allowed for disabilities in Canada even now. A person can get assisted suicide if they "have a serious and incurable illness, disease or disability." But since a person in Canada also is required to have a "reasonably foreseeable" death in order to get assisted suicide, that essentially prevents people in Canada from getting assisted suicide because of a disability. Basically, assisted suicide for disabilities is currently allowed in Canada de jure, but prohibited de facto.
This bill seeks to eliminate the "reasonably foreseeable death" requirement. That would mean you'd actually be allowed to get assisted suicide if you fail at a suicide attempt and end up quadripeligic.
Anyway, I saw somewhere that some (ostensible) disability rights activists are against this bill for facilitating the "myth" that quadripeligia is worse than death. To hear them talk, being unable to move a muscle, laying in bed in the same position all day, being unable to get a job, being unable to feed yourself and even being unable to poop yourself aren't a problem. The real problem is the Hitlerian societal attitudes towards quads. Heck, we never had beheadings in America because it was considered barbaric to make somebody a living head for about 4 seconds-but apparently being a living head for 40 years is a great life. People who aren't living heads just don't realize it.