(1)Where the duties of any employment which are performed by a person in the United Kingdom or a designated area consist wholly or mainly—
(a)of taking part, as a diver, in diving operations concerned with the exploration or exploitation of the seabed, its subsoil and their natural resources; or
(b)of acting, in relation to any such diving operations, as a diving supervisor,
the Income Tax Acts shall have effect as if the performance by that person of those duties constituted the carrying on by him of a trade within Case I of Schedule D; and accordingly Schedule E shall not apply to the emoluments from the employment so far as attributable to his performance of those duties.
(2)In this section “designated area” means any area designated under section 1(7) of the [1964 c. 29.] Continental Shelf Act 1964.