(3) Entities that meet the definition of intermediate educational unit or IEU in section 602(23) of the Act, as in effect prior to June 4, 1997. Under that definition an intermediate educational unit or IEU means any public authority other than an LEA that—
(i) Is under the general supervision of a State educational agency;
(ii) Is established by State law for the purpose of providing FAPE on a regional basis; and
(iii) Provides special education and related services to children with disabilities within the State.