(1) Neither this Part of this Act nor an hours of trading order nor an existing closing order shall apply to any shop in which either the only business carried on therein is a scheduled business or all the businesses carried on therein are scheduled businesses.

(2) Where -

(a) any excepted business is carried on in a shop, and

(b) any other business (not being a scheduled business) is carried on in such shop,

nothing contained in this Part of this Act or in an hours of trading order or an existing closing order shall render it unlawful for the proprietor of such shop to keep such shop open for the serving of customers at any time on any weekday if while such shop is so kept open no transaction (other than a transaction connected with such excepted business) is carried out therein.