(A) A person commits interference with a public institution of education when, on the campus of a public institution of education, or at or in any building or other facility owned, operated, or controlled by the institution, without authority from the institution he, through force or violence, actual or threatened:
(1) Willfully denies to a trustee, school board member, superintendent, principal, employee, student, or invitee of the institution:
(a) Freedom of movement at such place; or
(b) Use of the property or facilities of the institution; or
(c) The right of ingress or egress to the property or facilities of the institution; or
(2) Willfully impedes, obstructs, interferes with or disrupts:
(a) The performance of institutional duties by a trustee, school board member, superintendent, principal, or employee of the institution; or
(b) The pursuit of educational activities, as determined or prescribed by the institution, by a trustee, school board member, superintendent, principal, employee, student, or invitee of the institution; or
(3) Knowingly occupies or remains in or at any building, property or other facility owned, operated, or controlled by the institution after due notice to depart.
(B) Sentence. A person convicted of violation of this section commits a Class C misdemeanor for the first offense, and for a second or subsequent offense commits a Class B misdemeanor. If the interference with the public institution of education is accompanied by a threat of personal injury or property damage, the person commits a Class 3 felony and may be sentenced to a term of imprisonment of not less than two years and not more than 10 years, and may be prosecuted for intimidation in accordance with ILCS Ch. 720, Act 5, § 12-6.
(ILCS Ch. 720, Act 5, §§ 21.2-2, 21.2-4) Penalty, see § 130.99