279.—(1) Subject to subsection (2) of this section, the licence duty on each oyster fishing licence shall be two pounds.
(2) The Minister may, from time to time, by order, alter the licence duty in respect of an oyster fishing licence, so however that the licence duty in respect of such a licence shall not be so altered that it exceeds four pounds.
(3) Where the licence duty in respect of an oyster fishing licence is altered under subsection (2) of this section, the duty as so altered shall be payable in respect of any such oyster fishing licence which is to be valid for a period commencing on or after the 1st day of January next following the making of the order which effected the alteration.