California Code, Code of Civil Procedure - CCP § 1775.8

(a) The compensation of court-appointed mediators shall be the same as the compensation of arbitrators pursuant to Section 1141.18, except that no compensation shall be paid prior to the filing of a statement of nonagreement by the mediator pursuant to Section 1775.9 or prior to settlement of the action by the parties.

(b) All administrative costs of mediation, including compensation of mediators, shall be paid in the same manner as for arbitration pursuant to Section 1141.28. Funds allocated for the payment of arbitrators under the judicial arbitration program shall be equally available for the payment of mediators under this title.