If the conduct of a tenant, another occupant of the rental unit or a person permitted in the residential complex by the tenant substantially interferes with the reasonable enjoyment of the residential complex or another lawful right, privilege or interest of the landlord or another tenant a notice may be given. Notice cannot be effective earlier than 20 days and must explain the reasons for termination and require the tenant to stop the activity or conduct or correct the problem set out in the notice within seven days.