For the purposes of this chapter, the following definitions shall apply:
(a) “Appellant” means an applicant or client who has filed an oral or written request for an administrative review or a written request for a fair hearing.
(b) “Applicant” means any individual who has applied for vocational rehabilitation or independent living services which the department provides. The term also refers to individuals who apply for such services and are found ineligible.
(c) “Client” means any person receiving vocational rehabilitation or independent living services or support from the department.