For purposes of this chapter, the following terms have the following meanings:
(a) “County placing agency” means the county social services department or county probation department.
(b) “Educational authority” means an entity designated to represent the interests of a child for educational and related services.
(c) “Local educational agency” means a school district, a county office of education, a charter school participating as a member of a special education local plan area, or a special education local plan area.