(a) Because the school librarian plays a critical role in campus effectiveness and student achievement, the rules adopted by the State Board for Educator Certification in this subchapter ensure that each candidate for the School Librarian Certificate is of the highest caliber and possesses the knowledge and skills necessary to improve the performance of the diverse student population of this state.(b) An individual serving as a school librarian is expected to actively participate in professional development activities to continually update his or her knowledge and skills. Currency in best practices and research as related to both campus leadership and student learning is essential.(c) The holder of the School Librarian Certificate issued under the provisions of this subchapter may serve as a librarian in Prekindergarten-Grade 12.