WI x-bow
CadwalladerÑMy WI friend who is disabled (paralysed L. arm) states that you're correct, there it's certified disabled only, and only during archery season. He adds that X-bows are better than not bowhunting at all, but that if you can manage to draw a regular compound, you're much better off. He holds a nylon tab attached to the string with his teeth, draws a lefthanded bow with his right arm, and releases with his teeth. He was 8th in the state archery tournament last year, no special category for disabled. I guess he has a very good set of teeth. Plus he practices religiously, as should any archer.
Disadvantages of a x-bow, according to my friend, who began with one when he resumed hunting after his car accident, are 1) hard to cock, 2) short range, and 3) poor penetration. They fire a short, heavy bolt with a short movement of the string (relative to a "regular" bow), so the bolt has small energy for its mass, and starts slowing down quickly. Under 20 yd. they're OK, but why use one unless that's all you can use.
My friend is active in UFFDA, the United Foundation for Dsabled Archers, and encourages every disabled hunter he sees to join UFFDA, and to use a regular bow if they possibly can.
BTW, UFFDA is a fine organization, puts on hunts helping disabled hunters get back into the sport they loved, and is deserving of the support of all of us "normal" hunters. They can use volunteer help. Doing so sure helps me put my own little aches and pains and difficulties in proper perspective!