I agree that provisional membership for the first year is a good way to limit the damage if a new club does prove to be a serious problem. But in any event the CSL has the power to take any measures it deems necessary if any club, old or new, doesn't adhere to requirements.
If we end up with too many teams or clubs wanting to be in the CSL then at least we can be satisfied that it's a desirable competition to participate in. It'll be a good problem to have.