If any person— Penalty for

If any person— (a) obstructs, or molests any person with whom the Board 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 marks set up for the purpose of indicating any level or direction necessary to the execution or works authorised under this Act, he shah, on corVictien, be punished with imprisonment for a teim which may extend to three month or with fine which may extend to five hundred rupees or With both.