Where, in any proceedings under the Acts involving a trade description or under this Act, the truth of any indication, direct or indirect and by whatever means given -
(a) by a manufacturer, producer or other supplier thereof with respect to goods or the price of goods, or
(b) by a person providing services, accommodation or facilities with respect to the services, accommodation or facilities, or the charges for the services, accommodation or facilities,
is an issue, and the person who gave the indication does not establish that on the balance of probabilities the indication is true, it shall be presumed to be untrue.