(a) A person may not be employed as a teacher, teacher intern or teacher trainee, librarian, educational aide, administrator, educational diagnostician, or school counselor by a school district unless the person holds an appropriate certificate or permit issued as provided by Subchapter B.
(b) Except as otherwise provided by this subsection, a person may not be employed by a school district as an audiologist, occupational therapist, physical therapist, physician, nurse, school psychologist, associate school psychologist, licensed professional counselor, marriage and family therapist, social worker, or speech language pathologist unless the person is licensed by the state agency that licenses that profession and may perform specific services within those professions for a school district only if the person holds the appropriate credential from the appropriate state agency. As long as a person employed by a district before September 1, 2011, to perform marriage and family therapy, as defined by § 502.002, Occupations Code, is employed by the same district, the person is not required to hold a license as a marriage and family therapist to perform marriage and family therapy with that district.

(c) The commissioner may waive the requirement for certification of a superintendent if requested by a school district as provided by § 7.056. A person who is not certified as a superintendent may not be employed by a school district as the superintendent before the person has received a waiver of certification from the commissioner. The commissioner may limit the waiver of certification in any manner the commissioner determines is appropriate. A person may be designated to act as a temporary or interim superintendent for a school district, but the district may not employ the person under a contract as superintendent unless the person has been certified or a waiver has been granted.