Prohibition on explosives containing sulphur chlorate: manufacture, possession and importation barred, subject to specified limited exceptions. Prohibition on manufacture, possession and importation of explosives containing sulphur or sulphurate in admixture with potassium chlorate or any other chlorate, subject only to narrow exceptions permitting small quantities for scientific purposes, manufacture of match heads, use in toy amorces (paper caps for toy pistols), and in percussion caps for railway fog signals.