Each local or regional board of education that assigns a school resource officer to any school under the jurisdiction of such board shall enter into a memorandum of understanding with a local law enforcement agency regarding the role and responsibility of such school resource officer. Such memorandum of understanding shall (1) be maintained in a central location in the school district and posted on the Internet web site of the school district and each school in which such school resource officer is assigned, (2) include provisions addressing daily interactions between students and school personnel with school resource officers, and (3) include a graduated response model for student discipline. Any such memorandum of understanding entered into, extended, updated or amended (A) on or after July 1, 2021, shall include a provision that requires all school resource officers to complete, while in the performance of their duties as school resource officers and during periods when such school resource officers are assigned to be at the school, any separate training specifically related to social-emotional learning and restorative practices provided to certified employees of the school pursuant to sections 10-148a and 10-220a, and (B) on or after July 1, 2023, shall include provisions specifying a school resource officer’s duties concerning, and procedures for, the restraint of students, use of firearms, school-based arrests and reporting of any investigations and behavioral interventions of challenging behavior or conflict that escalates to violence or constitutes a crime, pursuant to the provisions of section 10-233p, provided such provisions are in accordance with any laws or policies concerning the duties of police officers. For the purposes of this section, “school resource officer” means a sworn police officer of a local law enforcement agency who has been assigned to a school pursuant to an agreement between the local or regional board of education and the chief of police of a local law enforcement agency.