Illinois Statutes Chapter 820. Employment § 175/42. Equal pay for equal work

(A) if there is a directly hired comparator employee of the third party client with the same or substantially similar level of seniority at the company and performing the same or substantially similar work on jobs the performance of which requires substantially similar skill, effort, and responsibility, and that are performed under similar working conditions, not less than the straight-time hourly rate of pay or hourly equivalent of the lowest paid directly hired comparator employee of the third party client who is entitled to overtime under the Fair Labor Standards Act of 1938, as amended, with the same or substantially similar level of seniority at the company and performing the same or substantially similar work on jobs the performance of which requires substantially similar skill, effort, and responsibility, and that are performed under similar working conditions; or

(B) if there is not a directly hired comparator employee of the third party client, not less than the straight-time hourly rate of pay or hourly equivalent of the lowest paid directly hired employee of the third party client who is entitled to overtime under the Fair Labor Standards Act of 1938, as amended, with the closest level of seniority at the third party client.

(A) if a day or temporary laborer has been assigned to work and performs work at the same third party client for more than 720 hours within a 12-month period, not less than the median base hourly rate, or hourly equivalent if paid on a salary basis, of workers working in the same or a substantially similar job classification, as reflected in the detail level of the most recent Standard Occupational Classification System published by the United States Department of Labor's Bureau of Labor Statistics, in the same metropolitan area or non-metropolitan area of Illinois where the work is performed, as reflected in the most recent Occupational Employment and Wage Statistics Survey, or any successor publication, published by the United States Department of Labor's Bureau of Labor Statistics; or

(B) if a day or temporary laborer has been assigned to work and performs work at the same third party client for more than 4,160 hours within a 48-month period, not less than the 75th percentile base hourly rate, or hourly equivalent if paid on a salary basis, of workers working in the same or substantially similar job classification, as reflected in the detail level of the most recent Standard Occupational Classification System published by the United States Department of Labor's Bureau of Labor Statistics, in the same metropolitan area or non-metropolitan area of Illinois where the work is performed, as reflected in the most recent Occupational Employment and Wage Statistics Survey, or any successor publication, published by the United States Department of Labor's Bureau of Labor Statistics.