(1) The Chief Forest Officer at his or her discretion may refuse to register any property mark on account of its similarity to any existing mark, or to any mark used by forest officers, or for any other reason which to him or her may seem sufficient.
(2) Registration of a property mark shall hold good from the date of such registration until the following 31 December and for the next succeeding 2 years, and registration of a classification mark shall hold good for the same period as that for which the property mark to which its subsidiary is registered.