Answer:
3 month before the lease expires if it is stated in the agreement
Explanation:
According to the law, they 3 month of notice, but the content of the agreement, we don't know, it might have been stated there that if before the lease expires, they want exist, they should give a period of notice, they will have to follow the agreement. But according to the law 3 months notice ,any other exceptions has to be in line with the agreement signed.