Whoever,—
(a) obstructs any person engaged or employed by the 1 [State Town and Country Planning Committee] or the District Planning Committee or the Metropolitan Planning Committee or the Development Authority or the Joint Planning Committee or the Local Self Government Institution or any person with whom the 2[State Town and Country Planning Committee] or the District Planning Committee or the Metropolitan Planning Committee or the Development Authority or the Joint Planning Committee or the Local Self Government Institution has entered into a contract, in the performance or execution by such person of his duty or of anything which he is empowered or required to do under this Act; or
(b) removes any mark set up for the purpose of indicating any level or direction necessary for the execution of works authorised under this Act, shall on conviction be punishable with imprisonment for a term which may extend to two months or with fine which may extend to five thousand rupees or with both.