The Illinois Prevailing Wage Act (820 ILCS 130/0.01 et. seq.) requires the City to establish the prevailing rate of wages for laborers, mechanics and other workers employed in performing public works projects for the City. The Act also contains administrative and recordkeeping requirements that the City and its contractors are mandated to strictly follow. The City requires that on projects which require a prevailing wage, copies of all Certified Transcript of Payroll be submitted prior to an invoice being paid.