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.
225 ILCS 705/17.07
Laws 1953, p. 701.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.