17. Part 4 of Schedule 3 to the Principal Act is amended by substituting the following for Rule 2 (amended by section 16 of the Social Welfare and Pensions Act 2011):

“2. (1) Where Rule 1(2)(b)(v)(I) applies to a person, ‘additional income’ in relation to that person means an amount determined, subject to paragraph (2), by the formula—

(A+B) - C

where—

A is the sum of—

(i) any weekly income arising which that person receives from such employment or training or participation or placement in such scheme or programme as is prescribed,

(ii) any weekly income which that person receives by way of family income supplement under Part 6, and

(iii) in so far as it exceeds €4,952 per annum, the aggregate of—

(I) any maintenance payments made by a liable relative, and

(II) the net cash value of the non-cash benefits referred to in Rule 1A(1),

B is the amount of the assessable weekly means of the person from all other sources under Part 4 of Schedule 3, and

C is the weekly rate of supplementary welfare allowance set out in column (2) of Part 1 of Schedule 4, increased by—

(i) the amount set out in column (3) of that Part, where the person has a qualified adult, and

(ii) the amount set out in column (4) of that Part in respect of each qualified child of that person.

(2) The amount determined by the formula in paragraph (1) shall not exceed the sum represented by A in that formula.”.