Calculation of income on a weekly basis
15.—(1) For the purposes of section 20(6A) of the Act (conditions of entitlement to disability working allowance), the income of a claimant shall be calculated on a weekly basis—
(a)by ascertaining in accordance with this Chapter and Chapter V of this Part (other income) the amount of his normal weekly income; and
(b)by adding to that amount the weekly income calculated under regulation 40 (calculation of tariff income from capital).
(2) For the purposes of paragraph (1) “income” includes capital treated as income under regulation 28 (capital treated as income) and income which a person is treated as possessing under regulation 29 (notional income).