77.—(1) An application requesting the Registrar to correct any clerical error or to amend the mark or the specification of goods or services or any other particulars (other than matters under rules 74 and 75) in the application for registration of a trade mark shall be on Form T.M. 27.
(2) An application to amend the specification of goods or services shall only be allowed in respect of goods or services within the particular class of goods or services applied for in the application for registration of the trade mark. No application for change of class of goods or services shall be allowed.