I know in Ontario, you must have a certain amount of ECE's working in your facility, as well as workers, per child ratio. There is a process to applying for licenses, and having your commercial space approved as a child care center. I know only because my sister is an ECE. Now if you're just looking at opening a home daycare, thats an easier process, but there are caps on how many children you can look after! Sorry I don't much more than that, so its best to call the governing body in your province!