California Code, Family Code - FAM § 7880

(a) Upon the filing of the petition, a citation shall issue requiring any person having the custody or control of the child, or the person with whom the child is, to appear at a time and place stated in the citation.

(b) The citation shall also require the person to appear with the child except that, if the child is under the age of 10 years, appearance with the child is required only upon order of the court after necessity has been shown.

(c) Service of the citation shall be made in the manner prescribed by law for service of civil process at least 10 days before the time stated in the citation for the appearance.  The party or attorney responsible for serving the citation shall do so in a timely manner in order to maximize the response time available to the party being served.