# The Dual-Use and Related Goods (Export Control) Regulations 1995, Paragraph 44: DEFINITIONS OF TERMS IN THIS ANNEX


“Effective gramme” (0) of “special fissile material” or “other fissile material” means:
a. For plutonium isotopes and uranium-233, the isotope weight in grammes;
b. For uranium enriched 1 per cent or greater in the isotope U-235, the element weight in grammes multiplied by the square of its enrichment expressed as a decimal weight fraction;
c. For uranium enriched below 1 per cent in the isotope U-235, the element weight in grammes multiplied by 0.0001;
d. For americium-242m, curium-245 and -247, californium-249 and -251, the isotope weight in grammes multiplied by 10;

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Source: https://www.legislation.gov.uk/uksi/1995/271/schedule/1/paragraph/44 (the official version)
Page: https://openlegislation.uk/dual-use-and-related-goods-export-control-regulations-1995/schedule-1/paragraph-44
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.