qualifications; certification of aliens.
Any professional educator, as defined in article one of this chapter, who is employed within the public school system of the state shall hold a valid teaching certificate licensing him or her to teach in the specializations and grade levels as shown on the certificate for the period of his or her employment. If a teacher is employed in good faith on the anticipation that he or she is eligible for a certificate and it is later determined that the teacher was not eligible, the state Superintendent of Schools may authorize payment by the county board of education to the teacher for a time not exceeding three school months or the date of notification of his or her ineligibility, whichever shall occur first. All certificates shall expire on June 30 of the last year of their validity irrespective of the date of issuance.