When not undercut or sheared, the entry and crosscut may be advanced concurrently, but no room shall be opened in advance of the last open crosscut; and after the entry has advanced 15 feet beyond the location of a new crosscut, only one shot shall be fired in the entry to two in the crosscut at the same shooting time.
225 ILCS 705/17.03
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.