(1) If the notice of an application has been published under section 14, the application may be amended as provided in this section.
(2) An amendment may be made to the representation of the trade mark if the amendment does not substantially affect the identity of the trade mark as at the time when the notice of the application was published.
(3) An amendment may be made to correct a mistake of fact or an error in the classification of any goods or services specified in the application.
(4) An amendment may be made to change the type of registration sought in the application.
(5) An amendment may be made to any particular specified in the application other than that referred to in subsection (4), unless the amendment would have the effect of extending the rights that, apart from the amendment, the applicant would have under the registration if it were granted.