An article of a type for the time being certified or approved by the Minister of PowerF1 for the purposes of the Mines and Quarries Act 1954 M1 or regulations made thereunder shall be treated as certified or approved by[F2 the Executive] for the purposes of this Act or, as the case may be, regulations, unless[F2 the Executive], by notice published in the Belfast Gazette and otherwise brought to the notice of persons concerned in such manner as[F2 the Executive] thinks fit, directs that it shall not be so treated.