3.—(1) There are excluded from the operation of section 52 of the Act—
(a)works of sculpture, other than casts or models used or intended to be used as models or patterns to be multiplied by any industrial process;
(b)wall plaques, medals and medallions; and
(c)printed matter primarily of a literary or artistic character, including book jackets, calendars, certificates, coupons, dress-making patterns, greetings cards, labels, leaflets, maps, plans, playing cards, postcards, stamps, trade advertisements, trade forms and cards, transfers and similar articles.
(2) Nothing in article 2 of this Order shall be taken to limit the meaning of “industrial process” in paragraph (1)(a) of this article.