(1) The Minister may, whenever and so often as he thinks fit, by order (in this Part of this Act referred to as an hours of Sunday-trading (exempted businesses) order), do the following things, that is to say: -

(a) declare that a particular area specified in or delimited by such order shall be a trading area for the purposes of such order; and

(b) either -

(i) declare that it shall not be lawful for the proprietor of any shop (being a shop in which there is carried on any business which is for the time being an exempted business for the purposes of this Part of this Act) situate in such trading area to open or keep open such shop for the serving of customers on any Sunday before a specified hour or after a specified hour, or

(ii) declare that it shall not be lawful for the proprietor of any shop (being a shop in which there is carried on any business which is for the time being an exempted business for the purposes of this Part of this Act) of a specified class (defined in such manner and by reference to such things as the Minister thinks proper) situate in such trading area to open or keep open such shop for the serving of customers on any Sunday before a specified hour or after a specified hour;

and such order may contain different provisions in relation to different periods of the year.