Location:https://texas.public.law/statutes/tex._educ._code_section_21.3521
.
Original Source:
Texas Legislature Online,
§ 21.3521 — Local Optional Teacher Designation System,
http://www.statutes.legis.state.tx.us/Docs/ED/htm/ED.21.htm#21.3521
(last accessed Apr. 16, 2021).