37.—(1) Current income is the sum of the non-resident parent’s income—
(a)as an employee or office-holder;
(b)from self-employment; and
(c)from a pension,
calculated or estimated as a weekly amount at the effective date of the relevant calculation decision in accordance with regulations 38 to 42.
(2) Where payment is made in a currency other than sterling, an amount equal to any banking charge payable in converting that payment to sterling is to be disregarded in calculating the current income of a non-resident parent.