With respect to the submitted documents of incorporation, they are not written in stone. Amendments can be filled at any time and may need to be filled a couple of times to get wording that the Canada Revenue Agency is willing to except as charitable.
The process is: 1) Incorporate as a non profit 2a) Submit application for charity status to Canadian Revue Agency 2b) Apply to the chapters committee to be recognized as an official chapter 3) If we wish to use ca.wikimedia.org this would be the time when we would get the domain I assume.