The Credit Cards (Price Discrimination) Order 1990
On and after 7th March 1991, this Order makes it unlawful for any person to make or carry out any agreement relating to credit cards to the extent that it imposes or requires the imposition of a “no discrimination rule”. A “no discrimination rule” prohibits merchants from charging different prices to those who pay by credit card rather than by another means of payment. All such existing agreements must be terminated before 7th March 1991.