5.—(1) For the purpose of obtaining the information necessary for the appreciation of economic trends and the provision of a statistical service for industry and for the discharge by Government departments of their functions, any Northern Ireland department may, by notice in writing served on any person carrying on an undertaking, require that person to furnish, in such form and manner and within such time as may be specified in the notice, such periodical or other estimates or returns about such of the matters set out in the Schedule as may be so specified.
(2) A notice under paragraph (1) shall state that it is served under this Article and the main purpose for which the estimates or returns are required.