Section 191(a) in The Building And Other Construction Workers '(Regulation Of Employment And Conditions Of Service) Central Rules, 1998
(a)standards of a scaffold are,-(i)plumb, where practicable;(ii)fixed sufficiently close together to secure the stability of such scaffold having regard to all the possible working situations and conditions for the intended use of such scaffold;(iii)spaced, as close as practicable, to ensure safety and stability of such scaffold;