Regulation 23:(1) Within two months from the date of any advertisement in the Daily Graphic or other periodical circulating in Ghana of an application to register a certification trade mark, any person may give notice to the Registrar of opposition under sub paragraph (1) of paragraph 2 of the First Schedule to the Act, and regulations 15 to 22 shall apply to the proceedings thereon; and any person may give notice to the Minister of opposition under sub-paragraph (2) of paragraph 2 of the said First Schedule, and rules 15 to 22 shall apply mutatis mutandis to the proceedings thereon.(2) In any case of doubt any party may apply to the Registrar or the Minister, as the case may be, for directions.