10 ILCS 5/24-1.2
Paper ballots may be used for the conduct of the consolidated election in odd-numbered years, the special municipal primary in even-numbered years, and emergency referenda held at any time, except in regular elections in which the only offices or propositions on the ballot are for political subdivisions for which offices have heretofore been voted on using voting machines or electronic voting systems and except as otherwise provided by regulation of the State Board of Elections adopted pursuant to this Section.
The State Board of Elections may adopt regulations requiring the use of voting machines or electronic voting devices, as are available in the jurisdiction of the election authority, in such elections. Such regulations shall be applicable uniformly statewide, and shall require the use of such voting equipment only in those elections and only in those precincts where (1) the ballots to be voted are complex, due to large numbers of offices, candidates, or public questions required to be on the ballot, (2) the number of political subdivisions whose officers or public questions are to be included on the ballot is substantial, and (3) the use of such voting equipment is efficient, cost effective, and does not result in unjustified election expenses to be reimbursed by the political subdivisions that will share such expenses pursuant to Sections 17-30 through 17-33. Such regulations may provide reasonable classifications based on the above factors.
10 ILCS 5/24-1.2