110 ILCS 130/15: Automatic fire sprinkler systems required.

(a) In the case of a Greek housing structure the construction of which is begun on or after January 1, 2011, that construction must include the installation of automatic fire sprinkler systems.

(b) In the case of a Greek housing structure construction of which was begun before January 1, 2011, automatic fire sprinkler systems are required in every such structure by January 1, 2019.

(c) If a Greek housing structure does not comply with this Section, it is unlawful to occupy the structure as a Greek housing structure.

(d) Nothing in this Act may be construed to abrogate any statute, rule, or ordinance requiring that a fire extinguisher be present in a Greek housing structure.