That really depends on the law in your area. I'm on the Illinois side of St. Louis, MO. My city requires a new occupancy permit every time a new tenant moves in. Not sure where you live, but that laws will be local...
Can A Landlord Rent A House Without An Occupancy Permit?
An occupancy permit is given when the dwelling is finished being built or rebuilt as the final inspection is done so you can move in. The answer is no. An occupancy permit is not required between tennants.