(225 ILCS 705/17.07) (from Ch. 96 1/2, par. 1707)
    Sec. 17.07. If the conditions are such that in the judgment of the Mining Board, expressed in writing, it is considered equally safe and more advantageous to leave a blind pillar between not less than every three rooms, the Mining Board may grant the authority to leave the pillar, subject to review by the Mining Board on complaint of either interested party.
(Source: Laws 1953, p. 701.)