Section 172(e) in The Building And Other Construction Workers '(Regulation Of Employment And Conditions Of Service) Central Rules, 1998
(e)every ladder is-(i)secured so as to prevent undue swaying;(ii)equally and properly supported on each of its upright;(iii)so used as not to cause undue sagging; and(iv)placed as nearly as possible at an inclination of four in one;
