29.—(1) Where by virtue of these Regulations two or more persons would be entitled to child benefit in respect of the same child or qualifying young person for the same week under both the legislation of Northern Ireland and Great Britain, one of them only shall be so entitled.
(2) Where the child is in Great Britain (except where regulation 25(1)(d) applies) or is treated as being in Great Britain, the question of which of the persons is entitled shall be determined in accordance with the legislation applying to Great Britain.
(3) Where the child is in Northern Ireland (except where regulation 21(1)(d) applies) or is treated as being in Northern Ireland, the question of which of the persons is entitled shall be determined in accordance with the legislation applying to Northern Ireland.