Section 10 ILCS 5/15-4 - Board of Election Commissioners to provide election supplies to municipalities(a) In municipalities operating under Article 6 of this Act the Board of Election Commissioners shall provide all necessary ballot boxes and all registration record cards, forms of affidavits, forms of notices, certificates of registered voters, tally sheets, blanks and stationery of every description, with printed headings and certificates, necessary and proper for the registry of voters and the conduct of such elections and for every incidental purpose, connected therewith.(b) The Board of Election Commissioners may provide ballot boxes not of a permanent type, not of wooden or metal construction, not requiring locks or keys, nor having doors or windows, if (1) such ballot boxes are so constructed as to be completely sealed and empty units upon delivery to the polling place, (2) they can be prepared for the inserting and depositing of ballots by the removal of a perforated section in the top of each such ballot box, which removal creates an open slot not larger than is sufficient to admit a single closed ballot to be inserted therein at one time and through which each ballot voted shall be put into the boxes, and (3) such ballot boxes contain a perforated door or flap on one side which can be unsealed and opened for removal of the ballots when voting has been completed. No ballot box authorized by this paragraph shall be used on more than one election day.