For the purposes of this article, the following words, terms and phrases shall have the following interpretations:
(1) SPECIAL EDUCATIONAL SERVICES. Services relating to instruction of exceptional children with disabilities.
(2) EXCEPTIONAL CHILDREN. Those children and youth with disabilities determined eligible for special education and related services under existing federal and state laws, rules, regulations and policies governing special education.
(3) CATASTROPHIC. Those cases where special education and related services which are required for a particular child are unduly expensive, extraordinary and/or beyond the routine and reasonable special education and related services provided by the local education agency.
(4) LOCAL EDUCATION AGENCY. A county or city school district in the State of Alabama.