50 ILCS 220/2
Any municipality is hereby authorized to adopt by reference, as criteria for the issuance of construction, reconstruction, alteration or installation permits, the provisions of any code or portions of any code as herein defined, without setting forth the provisions of such codes in full, provided that at least three (3) copies of such code which is incorporated or adopted by reference are filed in the office of the clerk of the municipality and there kept available for public use, inspection, and examination. Any municipality is likewise authorized and empowered to adopt by reference the provisions of any public records, provided, likewise, that three (3) copies of such public record are kept on file in the office of the clerk of the municipality as provided above for codes. The filing requirement herein prescribed shall not be deemed to be complied with unless the required copies of such code or public record are filed with the clerk of such municipality for a period of 15 days prior to adoption of the ordinance which incorporates such code or public record by reference. No code nor public record of any jurisdiction other than the State of Illinois shall be adopted hereunder covering any subject matter for which standards are available in any public record of the State of Illinois, except in the case of fire protection districts, which may adopt any national standard by reference, notwithstanding the provisions of this Section.
50 ILCS 220/2