) uranium-233; (iii) uranium enriched in its 235 or 233 isotopes; (iv) transuranium elements; or (v) any composition of any of the materials referred to in subparagraphs (i), (ii), (iii) and (iv) or any composition of the said materials and any other substance or substances, with concentration and mass limits above those specified in the notice, to be special nuclear material for the purposes of t