For purposes of this chapter:
(1) “Component school district” means a common school district or a union high school district that:
(a) Is located within the territory of an education service district; and
(b) Is not withdrawn from the education service district as provided in ORS 334.015.
(2) “Education service district” means a district created under ORS 334.010 that provides regional educational services to component school districts.
(3) “Joint school district” means a common school district or a union high school district located within the territory of more than one education service district.