; and (B) encompasses a range of systemic and individualized positive strategies to teach and reinforce school-expected behaviors, while discouraging and diminishing undesirable behaviors. (6) Program The term program means— (A) all of the operations of a local educational agency, system of vocational education, or other school system; (B) a program that serves children who receive services for which financial assistance is provided in accordance with the Head Start Act ( 42 U.S.C. 9831 et seq. ); or (C) an elementary school or secondary school that is not a public school that enrolls a student who receives special education and related services under the Individuals with Disabilities Education Act ( 20 U.S.C. 1400 et seq. ). (7) Program personnel (A) In General Subject to subparagraph (B), the term program personnel means any agent of a program, including an individual who is employed by a program, or who performs services for a program on a contractual basis, including— (i) school leaders; (ii) teachers; (iii) specialized instructional support personnel; (iv) paraprofessionals; or (v) other staff. (B) Exclusion Notwithstanding subparagraph (A), program personnel shall not include a law enforcement officer or a school security guard. (8) Protection and advocacy system The term protection and advocacy system means a protection and advocacy system established under section 143 of the Developmental Disabilities Assistance and Bill of Rights Act of 2000 ( 42 U.S.C. 15043 ). (9) Law enforcement officer The term law enforcement officer — (A) means any person who— (i) is a State, Tribal, or local law enforcement officer (as defined in section 1204 of title I of the Omnibus Crime Control and Safe Streets Act of 1968 ( 34 U.S.C. 10284 )); and (ii) is assigned by the employing law enforcement agency to a program, who is contracting with a program, or who is employed by a program