Well this is interesting . 117.15

(2) restriction- in making regulations,the govenor general in council may not pre-scibe anything to be a prohibited firearm,a restricted firearm, a prohibited weapon,a restricted weapon, a prohibited device or prohibited ammunition if,in the opinion of the governor in council, the thing to be presented  is reasonable for use in canada for hunting or sport shooting purposes. 

1995 c.39 s.139

 Sorry having issues getting photo centered so copied word for word.