California Code, Family Code - FAM § 6303

(a) It is the function of a support person to provide moral and emotional support for a person who alleges to be a victim of domestic violence. The person who alleges to be a victim of domestic violence may select any individual to act as a support person. No certification, training, or other special qualification is required for an individual to act as a support person. The support person shall assist the person in feeling more confident that the person will not be injured or threatened by the other party during the proceedings where the person and the other party must be present in close proximity. The support person is not present as a legal adviser and shall not give legal advice.

(b) A support person shall be permitted to accompany either party to any proceeding to obtain a protective order, as defined in Section 6218. Where the party is not represented by an attorney, the support person may sit with the party at the table that is generally reserved for the party and the party's attorney.

(c) Notwithstanding any other law to the contrary, if a court has issued a protective order, a support person shall be permitted to accompany a party protected by the order during any mediation orientation or mediation session, including separate mediation sessions, held pursuant to a proceeding described in Section 3021. Family Court Services, and any agency charged with providing family court services, shall advise the party protected by the order of the right to have a support person during mediation. A mediator may exclude a support person from a mediation session if the support person participates in the mediation session, or acts as an advocate, or the presence of a particular support person is disruptive or disrupts the process of mediation. The presence of the support person does not waive the confidentiality of the mediation, and the support person is bound by the confidentiality of the mediation.

(d) In a proceeding subject to this section, a support person shall be permitted to accompany a party in court where there are allegations or threats of domestic violence and, where the party is not represented by an attorney, may sit with the party at the table that is generally reserved for the party and the party's attorney.

(e) This section does not preclude a court from exercising its discretion to remove a person from the courtroom when it would be in the interest of justice to do so, or when the court believes the person is prompting, swaying, or influencing the party protected by the order.