159.—(1) Subject to paragraph (2), the claimant is to be treated as not having limited capability for work if the claimant is disqualified for receiving a contributory allowance during a period of imprisonment or detention in legal custody if that disqualification is for more than 6 weeks.
(2) Where the claimant is entitled to an amount under paragraph 3 of Schedule 5 (special cases: prisoners) during a period of imprisonment or detention in legal custody, the claimant is to be treated as not having limited capability for work from the day after the day on which entitlement ended.