(225 ILCS 705/7.20) (from Ch. 96 1/2, par. 720)
Sec. 7.20.
On boilers connected with one another by what is known as
headerlines, all valve connections thereto shall be closed and securely
fastened while the boiler or boilers are being washed, cleaned, or repaired
for the protection of the person so engaged.
(Source: Laws 1953, p. 701.)
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