33. Any person who at any time hinders, obstructs or molests the

Authority or any of its employees, agents or contractors in the performance and execution of their duty or of anything which they are respectively empowered or required to do by virtue or in consequence of this Act, or removes any mark set up for the purpose of indicating any level or direction necessary for the execution of works authorised by this Act, is guilty of an offence and liable on conviction to a fine not exceeding $10,000, imprisonment for a term not exceeding one year or both.