Paragraph I1
England, Wales and Scotland
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.