a person who has ceased to live in accommodation provided for him by a local authority under Part III of the Children Act 1989 F1 (local authority support for children and families) and is of necessity living away from his parents and any person acting in place of his parents;

a person who has been discharged from any institution to which the Prison Act 1952 F2 applies or from custody under the Criminal Procedure (Scotland) Act 1975 F3 after the child benefit extension period and who is a person falling within paragraph (2) of regulation 57.

Except where regulation 61(1)(d) or (e) applies, the period in the case of a person falling within paragraph 1(a) is the period which begins on the day on which that paragraph first applies to that person and ends on the day before the day on which that person attains the age of 18 or the day at the end of a period of 8 weeks immediately following the day on which paragraph 1(a) first had effect in relation to him, whichever is the earlier; and this period may include any week in which regulation 7 of the Child Benefit (General) Regulations 1976 (circumstances in which a person who has ceased to receive full-time education is to continue to be treated as a child) also applies to that person;

except where regulation 61(1)(d) or (e) applies, the period in the case of any person falling within paragraph 1(b) is the period beginning on the day F4... he was discharged, and ends on the last day of the period of 8 weeks beginning with the date on which the period began or on the day before the date on which that person attains the age of 18, whichever first occurs.