S-2.1, r. 4 - Safety Code for the construction industry

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2.15.7.3. A mobile crane with a luffing boom transformed and used for purposes other than the hoisting of loads such as a shovel, a dragging bucket, a clamshell bucket or a pile hammer shall be equipped with:
(a)  bumpers or boom stops; and
(b)  a high boom angle switch.
R.R.Q., 1981, c. S-2.1, r. 6, s. 2.15.7.3.