You would introduce your new rules after you take ownership. Study your state landlord tenant regulations, they are the bible for your business practices, and determine how much notice , if any, is required for rule changes.
Remember any rule you implement must be enforced to the letter. If you are inconsistent in enforcing community rules thy will become null and void. If you do not intend to do so then do not put them in your rules.
If you are not prepared to evict there is no point in having rules at all.
If you search on line you should be able to find examples of other community owners rules.