Each board of education shall separately or jointly with one or more boards of education employ a psychological examiner, who acting jointly with special education personnel approved by the commissioner, shall administer the procedures for diagnosis and classification required in this chapter, or, in lieu of employing a psychological examiner, it or they may contract to use, with or without financial reimbursement, the psychological or other services of any clinic or agency approved by the commissioner.
N.J.S. § 18A:46-11