# The Ionising Radiations Regulations 2017, Paragraph 9


Without prejudice to paragraph 8—
(a) the limit on equivalent dose for the lens of the eye is—
(i) 20 mSv in a calendar year; or
(ii) in accordance with conditions approved by the Executive from time to time, 100 mSv in any period of five consecutive calendar years subject to a maximum equivalent dose of 50 mSv in any single calendar year;
(b) the limit on equivalent dose for the skin is 500 mSv in a calendar year as applied to the dose averaged over any area of 1 cm2 regardless of the area exposed;
(c) the limit on equivalent dose for the extremities is 500 mSv in a calendar year.

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Source: https://www.legislation.gov.uk/uksi/2017/1075/schedule/3/paragraph/9 (the official version)
Page: https://openlegislation.uk/ionising-radiations-regulations-2017/schedule-3/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.