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

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8.7.7. A flexible ladder may be used if the use of a rigid ladder is impossible and on condition that it is:
(a)  solidly anchored at both ends; and
(b)  suspended so that movement of hands and feet is not restricted.
R.R.Q., 1981, c. S-2.1, r. 6, s. 8.7.7.