An approved carbon monoxide alarm used in an occupancy or structure that has one or more dwelling units, as defined in the Act, must be listed in accordance with UL 2034, as incorporated by reference in Section 112.180. An approved combined carbon monoxide and smoke alarm used in an occupancy or structure that has one or more dwelling units, as defined in the Act, must be listed in accordance with UL 2034 and UL 217, as incorporated by reference in Section 112.180.
Ill. Admin. Code tit. 41, § 112.200