70 ILCS 2005/9

Whenever a district owns any personal property which in the opinion of three-fourths of the members of the board of trustees is no longer necessary or useful to or for the best interests of the district, a majority of the board of trustees then holding office, at any regular meeting or at any special meeting called for that purpose, may by ordinance authorize the sale of that personal property in such manner as they may designate, with or without advertising the sale.