This is the original version (as it was originally made).
Regulation 3(1)
For the purpose of regulation 3(1), the specified mass of a fissile material set out below is—
(a)plutonium as Pu-239 or Pu-241 or as a mixture of plutonium isotopes containing Pu-239 or Pu-241 – 150 grams;
(b)uranium as U-233 – 150 grams;
(c)uranium enriched in U-235 to more than 1% but not more than 5% - 500 grams; and
(d)uranium enriched in U-235 to more than 5% - 250 grams.
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