As you say, it’s an evolving field. I would think that any by-law you create would be out of date within a year or two. What is your particular concern? You don’t want the minutes of your meetings, or your quotes and invoices, to be used to teach AI? You don’t want someone using AI to prepare a by-law or a Tribunal defence? In the latter case, just deal with the situation if and when it arises. If someone has used AI to prepare a document or an argument, you can edit and correct the document (or ask them to) at the time. If you don’t want your minutes or invoices to be used to teach AI, you might ask why not. What is so private?
AI might also be introduced into some service offerings, such as fire safety inspections or analysing plumbing leaks. Do you have an issue with this? If it’s an improved techology with improved performance, would you want to ban it? Or would your by-law encourage it, and if so why do you need a by-law?
Off the top of my head, I can’t think of other issues that might be of concern. Perhaps if can be more specific we can think more deeply about this.