Exemption without any limitation or condition5
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.