14.—(1) Subject to paragraph (3), the Authority shall make to its members payments by way of travelling allowance or subsistence allowance where expenditure on travelling or, as the case may be, on subsistence is necessarily incurred by the member for the purpose of enabling him to perform his duties as a member including (without limitation) attendance at meetings of the Authority and of committees appointed by the Authority.
(2) Allowances payable under this regulation shall be paid at the rates set out in Schedule 4.
(3) The Authority shall not pay an allowance under this regulation if the member is entitled to receive, apart from this regulation, an allowance of the same nature for the performance of the same duties under any enactment, instrument, contract or by virtue of any other right.