(225 ILCS 705/19.03)
(from Ch. 96 1/2, par. 1903)
It is unlawful to employ underground, at any one time, more men
than, in the judgment of the State mine inspector, are necessary to
complete speedily the connections with the escapement shaft or adjacent
mine; and said number must not exceed 20 men at any one time for any
purpose in said mine until such escapement or connection is completed.
(Source: Laws 1953, p. 701.)