(a) If the court appoints counsel under this chapter to represent the child, counsel shall receive a reasonable sum for compensation and expenses, the amount of which shall be determined by the court. Except as provided in subdivision (b), this amount shall be paid by the parties in the proportions the court deems just.
(b) Upon its own motion or that of a party, the court shall determine whether both parties together are financially unable to pay all or a portion of the cost of counsel appointed pursuant to this chapter, and the portion of the cost of that counsel which the court finds the parties are unable to pay shall be paid by the county. The Judicial Council shall adopt guidelines to assist in determining financial eligibility for county payment of counsel appointed by the court pursuant to this chapter.