73Effective doses

73  Effective doses

 (1) For the purposes of section 72, a person’s effective dose for a period that is relevant to the person under subsection (2) of this section is the sum of:

 (a) the effective dose that the person receives, from a source outside the person’s body, during the relevant period; and

 (b) the person’s committed effective dose, received from intakes during the relevant period, for the next 50 years.

 (2) For the purposes of subsection (1), a period that is relevant to a person is:

 (a) if the person is an occupationally exposed person—5 years; or

 (b) if the person is a member of the public—1 year.

 (3) Despite paragraph (1)(b), if the person is under 18 years of age, the committed effective dose must be worked out on the basis of the number of years calculated by subtracting the person’s age, at the time of the calculation, from 70.