Under what circumstances will a probationer be subject to a warrantless search?

activity and obeys all laws during the probationary period, the court may impose conditions intended to aid the probation officer in supervising the probationer and promoting his or her rehabilitation. (Id. at pp. 380-381; People v. Balestra (1999) 76 Cal.App.4th 57, 67 ["a warrantless search condition is intended to ensure that the [probationer] is obeying the fundamental condition of all grants of probation, that is, the usual requirement . . . that a probationer 'obey all laws' "].)