Section 487(1)(a) in The Delhi Municipal Corporation Act, 1957
(a)that any duty imposed on [a Corporation] [Substituted by Delhi Act 12 of 2011, section 2(a), "for the Corporation" (w.e.f. 13-1-2012)] or any municipal authority by or under this Act has not been performed or has been performed in an imperfect, insufficient or unsuitable manner, or