(a) "Class of certificates" means a certificate with the following characteristics:(1) specific job duties or functions associated with the certificate;(2) standards established by the State Board for Educator Certification (SBEC) for the issuance of the certificate; and(3) comprehensive examination(s) prescribed by the SBEC, as specified in §230.21 of this title (relating to Educator Assessment).(b) Classes of certificates include the following:(1) superintendent;(2) principal;(3) classroom teacher (categories of classroom teaching certificates are described in Chapter 233 of this title (relating to Categories of Classroom Teaching Certificates));(4) reading specialist;(5) legacy master teacher;(6) school librarian;(7) school counselor; and(8) educational diagnostician.