I have a tenant in Los Angeles in a rent controlled unit which was initially rented to a husband and wife. Wife recently notified saying he s moving out and terminating lease as she is dicorcing. The husband stayed back and has subleased/allowed his daugther and son in law and 2 kids to move in without my consent. He also called the city and we have a notice to change carpet and a mold test to be done for bathroom. 

However at the same time the cosignor has notified that she will get everyone out this month. I am confused on whether I should move forward and replace carpet and do the mold test or can hold off as they are leaving as per the co-signor. Is it legally required to address this issue before they move? The husband and other occupants dont want to leave as they have bad credit and are just trying to take advantage by calling city on us. They also do illegal activities from the premises we have heard from the neighbors. 

They paid rent this month after a lot of games  blaming COVID and sending us leters that they wont but the co-signor stepped in and got them to pay the rent to avoid and eviction/ruining her credit if this proceeds to eviction.

Are we legally binded to address the mold issue and old torn carpet which is due to a bull dog they have without our consent?