14X-5-504.9 Carbon monoxide alarms.
Carbon monoxide alarms must be provided in existing structures in accordance with Sections 14X-5-504.9.1 through 14X-5-504.9.3. Installation must be in accordance with Section 915.4 of the Chicago Building Code.
Exceptions:
1.   Carbon monoxide alarms are allowed to be solely battery operated where the code that was in effect at the time of installation did not require hard-wired carbon monoxide detectors to be provided.
2.   A carbon monoxide detection system in accordance with Section 915.5 of the Chicago Building Code is an acceptable alternative to carbon monoxide alarms.
3.   A carbon monoxide alarm is not required by this section in any occupancy or at any location where a carbon monoxide alarm is not required by Section 915 of the Chicago Building Code.