(a) Except as provided by Subsection (b), before a teacher may be employed under a term contract, the teacher must be employed under a probationary contract for the period provided by Subchapter C.
(b) A school district may employ a person as a principal or classroom teacher under a term contract if the person has experience as a public school principal or classroom teacher, respectively, regardless of whether the person is being employed by the school district for the first time or whether a probationary contract would otherwise be required under § 21.102.