W. Va. Code § 18-10A-2a
(b) For purposes of this section, the following words shall be construed as follows:
(1) "Rehabilitation teacher" means any person employed by the division and who meets the certification requirements of section two-a, article three, chapter eighteen-a of this code, or who has been certified to teach by a state or nationally recognized organization, as approved by the office of the secretary of education and the arts. The teachers shall maintain current certification in their teaching areas in order to remain employed and may teach only in the areas in which they are certified: Provided, That teachers who were employed on or before April 1, 1995, are exempt from the following requirements: