Tennessee Code Title 49. Education § 49-2-804

(a) If a written request for a reasonable accommodation is denied by the principal, then the student, teacher, or employee, or the student's parent or legal guardian, as applicable, may appeal the decision to the director of schools, or to the director's designee, by submitting a written request for an appeal to the director of schools, or the director's designee, within fifteen (15) calendar days of the individual's receipt of the principal's written decision denying their request for accommodation. The director of schools, or the director's designee, shall investigate and attempt to resolve the complaint within fifteen (15) calendar days of the director of schools', or the director's designee's, receipt of the written request for an appeal.

(b) If a written request for a reasonable accommodation is denied by the director of schools, or the director's designee, then the student, teacher, or employee, or the student's parent or legal guardian, as applicable, may appeal the director of schools', or the director's designee's, decision by requesting a hearing on the matter before an impartial hearing officer selected by the local board of education. To appeal the director of schools', or the director's designee's, decision:

(c) As used in this section, “impartial” means that the selected hearing officer has no history of employment with the local board of education or the director of schools, and has no relationship with any member of the respective local board of education or with the person requesting the hearing.