What is a reasonable cause requirement in probation search conditions?

6 As these cases illustrate, if a sentencing judge believes that a "reasonable cause" requirement is warranted in the particular case, either initially or as a modification of the terms of probation (see, e.g., People v. Kern (1968) 264 Cal.App.2d 962, 965, 71 Cal.Rptr. 105), he has the discretion to place such language in the probation search condition. Absent such express language, however, a reasonable-cause requirement will not be implied.