(a) The agency shall develop model standards for providing notice regarding violent activity that has occurred or is being investigated at a school district campus or other district facility or at a district-sponsored activity to parents, guardians, and other persons standing in parental relation to students who are assigned to the campus, regularly use the facility, or are attending the activity, as applicable. The standards must:
(1) include electronic notification through text messaging and e-mail;
(2) provide an option for real-time notification; and
(3) protect student privacy.
(b) Each school district shall adopt a policy for providing notice described by Subsection (a) in a manner that meets the standards adopted under that subsection.