CALIFORNIA PROBATE CODE SECTION 851

851. (a) At least 30 days prior to the day of the hearing, thepetitioner shall cause notice of the hearing and a copy of thepetition to be served in the manner provided in Chapter 4 (commencingwith Section 413.10) of Title 5 of Part 2 of the Code of CivilProcedure on all of the following persons where applicable:

(1) The personal representative, conservator, guardian, or trusteeas appropriate.

(2) Each person claiming an interest in, or having title to orpossession of, the property. (b) Except for those persons given notice pursuant to subdivision (a), notice of the hearing, together with a copy of the petition,shall be given as provided in Section 1220 if the matter concerns adecedent estate, as provided in

Section 1460 if the matter concerns aconservatorship or guardianship, or as provided in Section 17203 ifthe matter concerns a trust to all of the following persons: (1) Each person listed in Section 1220 along with any heir ordevisee whose interest in the property may be affected by thepetition if the matter concerns a decedent estate. (2) Each person listed in Section 1460 if the matter concerns aconservatorship or guardianship. (3) Each person listed in Section 17203 if the matter concerns atrust. © The court may not shorten the time for giving the notice ofhearing under this section.