Exemption without any limitation or condition

5.  The exemption granted by Article 3 of this order in respect of the keeping and use of material falling within the last preceding Article, being material of any of the following descriptions, that is to say,—

(a) a solid or liquid substance falling within paragraph (a) (ii) of the last preceding Article and containing by weight four per cent. or less of natural thorium;

(b) an article made wholly or partly from, or incorporating, such a substance;

(c) hardener alloy kept or used solely for the production of magnesium alloy;

(d) an incandescent mantle;

(e) an article of thoria ware,

is granted without any limitation or condition.