(1) No conduct constitutes an offense unless it is a crime or violation under this Code or another statute of this State.

 (2) The provisions of Part I of the Code are applicable to offenses defined by other statutes, unless the Code otherwise provides.

 (3) This Section does not affect the power of a court to punish for contempt or to employ any sanction authorized by law for the enforcement of an order or a civil judgment or decree.