# The Nuclear Installations (Excepted Matter) Regulations 2017, Regulation 2: Interpretation

Extent: E+W+S+N.I.

In these Regulations—
“the Act” means the Nuclear Installations Act 1965;
“fissile material” means plutonium 239, plutonium 241, uranium 233, uranium 235 (where the mass of the isotope uranium 235 exceeds 1% of the total mass of all the uranium isotopes present), or any material containing any of them;
“the IAEA Regulations” means the 2012 Edition of the Regulations for the Safe Transport of Radioactive Material of the International Atomic Energy Agency.

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Source: https://www.legislation.gov.uk/uksi/2017/920/regulation/2 (the official version)
Page: https://openlegislation.uk/nuclear-installations-excepted-matter-regulations-2017/regulation-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.