California Code, Government Code - GOV § 70678

In addition to the fee set forth in Section 70677, a fee of twenty-five dollars ($25) shall be paid to the clerk of the court at the time of filing a motion, order to show cause, or other proceeding seeking to modify or enforce that portion of any judgment or order entered in this state or any other state which orders or awards the custody of a minor child or children or which specifies the rights of any party to the proceeding to visitation of a minor child or children.Fifteen dollars ($15) of the fee authorized in this section shall be used exclusively to pay the costs of maintaining mediation services provided under Chapter 11 (commencing with Section 3160) of Part 2 of Division 8 of the Family Code, and ten dollars ($10) of the fee shall be used exclusively to pay the costs of services provided by the family law facilitator under Section 10005 of the Family Code.