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 include provisions addressing daily interactions between students and school personnel with school resource officers and shall include a graduated response model for student discipline. Any such memorandum of understanding entered into, extended, updated or amended 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. 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.