430 ILCS 65/16
When 2% of the number of registered voters in the State desire to pass upon the question of whether the General Assembly should repeal this Act regulating the acquisition, possession and transfer of firearms and firearm ammunition, they shall, at least 78 days before a regular election to be held throughout the State, file in the office of the State Board of Elections, a petition directed to the Board in accordance with the general election law. The petition shall be composed of county petitions from each of the counties throughout the State and each county petition shall contain the signatures of at least 2% of the number of registered voters in the county. The petition shall request that the question "Should the General Assembly repeal the Act entitled 'An Act relating to the acquisition, possession and transfer of firearms and firearm ammunition, to provide a penalty for the violation thereof and to make an appropriation in connection therewith,' approved August 3, 1967, as amended?" be submitted to the voters of the State at the next ensuing State-wide election at which such question may be acted upon.
430 ILCS 65/16