(1)This Part needs to be read with section 835(3) and (4) of ICTA (general rule that deductions are to be allowed in the order resulting in the greatest reduction of liability to income tax).
(2)In the case of deductions under this Part, the general rule in that section is subject to—
(a)section 23(3) (which requires certain deductions to be made in order to establish “chargeable overseas earnings”), and
(b)section 381 (which requires deductions under other provisions to be taken into account before deductions under Chapter 6 of this Part (seafarers)).