Section 1203 Of Chapter 1. General Notice Provisions From California Probate Code >> Division 3. >> Part 2. >> Chapter 1.

. (a) Subject to subdivision (b), unless the particular provision governing the notice of hearing provides that the time for giving notice may not be shortened, the court may, for good cause, shorten the time for giving a notice of hearing.
  (b) Unless the particular provision governing the publication of notice of hearing otherwise provides, the court may not shorten the time for publication of notice of hearing.