19. The provisions of this Order shall not apply in relation to an indication given—
(a)in a catalogue of which copies have been sent for printing before 1st November 1991;
(b)in a periodical published before that date, being a periodical ordinarily published at regular intervals of more than 7 days;
(c)in a direct mail advertisement, circular or price list first issued before that date;
(d)in a cinematograph film or programme included in a cable programme service first exhibited before that date or in a radio or a television broadcast first broadcast before that date.