Can a probation officer supervise a minor on probation without declaring him a ward of the court?

If the juvenile court places the minor on probation without declaring him a ward of the court, the probation officer may supervise the minor up to six months. ( 725, subd. (a).) The juvenile court has no authority to impose a condition of probation beyond this six-month statutory period under section 725, subdivision (a). "'[T]he power of the court with regard to probation is strictly statutory, and the court cannot impose a condition of probation which extends beyond the maximum statutory period of probation.' [Citations.]" (People v. Gilchrist (1982) 133 Cal.App.3d 38, 44.) Under this option, the court may declare the minor a ward of the court if the minor "fails to comply with the conditions of probation imposed[.]" ( 725, subd. (a).)