Section 430 ILCS 135/15 - Violation(a) Willful failure to install or maintain in operating condition any carbon monoxide alarm required by this Act is a Class B misdemeanor. (b) Tampering with, removing, destroying, disconnecting, or removing the batteries from any installed carbon monoxide alarm, except in the course of inspection, maintenance, or replacement of the alarm, is a Class A misdemeanor in the case of a first conviction and a Class 4 felony in the case of a second or subsequent conviction. Added by P.A. 094-0741, § 15, eff. 1/1/2007.