(1) Except as provided otherwise in this section, and notwithstanding any other provision of this article 20, the use of a chemical, mechanical, or prone restraint upon a student of a school of a school district, charter school of a school district, or institute charter school is prohibited when the student is on the property of any agency or is participating in an off-campus, school-sponsored activity or event.
(2) The prohibition described in subsection (1) of this section does not apply to the use of mechanical or prone restraints on a student of a school of a school district, charter school of a school district, or institute charter school who is openly displaying a deadly weapon, as defined in section 18-1-901 (3)(e).
(3) The prohibition described in subsection (1) of this section does not apply to the use of mechanical or prone restraints by an armed security officer or a certified peace officer working in a school of a school district, charter school of a school district, or institute charter school when the officer:
(a) Has received documented training in defensive tactics utilizing handcuffing procedures;
(b) Has received documented training in restraint tactics utilizing prone holds; and
(c) Has made a referral to a law enforcement agency.
(4) The prohibition described in subsection (1) of this section does not apply to schools operated in state-owned facilities within the division of youth services.