Cal. Civil Code § 3424

(a) Upon notice and motion, the court may modify or dissolve a final injunction upon a showing that there has been a material change in the facts upon which the injunction was granted, that the law upon which the injunction was granted has changed, or that the ends of justice would be served by the modification or dissolution of the injunction. (b) Service of this motion to modify or dissolve a final injunction shall be made upon the nonmoving party by one of the following methods: (1) If the party has not appeared in the action, the motion shall be served in the same manner as a summons pursuant to Article 3 (commencing with Section 415.10) of Chapter 4 of Title 5 of Part 2 of the Code of Civil Procedure. (2) If the party has appeared in the action, the motion shall be served either upon the party or his or her attorney, or upon the party if he or she has appeared without an attorney, either in the same manner as a summons pursuant to Article 3 (commencing with Section 415.10) of Chapter 4 of Title 5 of the Code of Civil Procedure or in the manner provided by Chapter 5 (commencing with Section 1010) of Title 14 of Part 2 of the Code of Civil Procedure. (c) This section does not apply to a final injunction issued pursuant to the Family Code.