Sec. 604. (1) The court has jurisdiction over guardianship proceedings for developmentally disabled persons. (2) An appointment of a guardian for a developmentally disabled person shall be made only under this chapter, except that a guardian may be appointed for a minor where appropriate under sections 5201 to 5219 of the estates and protected individuals code, 1998 PA 386, MCL 700.5201 to 700.5219.