Section 51(1)(a) in New Town, Kolkata Development Authority Act, 2007
(a)remove alter or otherwise deal with any structure, wall, hoarding, scaffolding, fence, rail, post, platform or other projection, obstruction or encroachment which, without first obtaining its permission, in writing, has been erected or set up in, over, above of upon any public street/house-gully, sewer, drain; aqueducts, water-course, or ghat,