(1) Schedule 4 (amended by section 4 of the Social Welfare and Pensions Act 2015) to the Principal Act is amended by the substitution of the Parts set out in Schedule 2 for Parts 1 to 3 of the said Schedule 4.

(2) This section comes into operation -

(a) in so far as it relates to jobseeker's allowance (other than where payable in accordance with section 148A of the Principal Act), pre-retirement allowance and farm assist, on 8 March 2017,

(b) in so far as it relates to supplementary welfare allowance, on 13 March 2017,

(c) in so far as it relates to disability allowance, on 15 March 2017,

(d) in so far as it relates to one-parent family payment (other than where payable in respect of a widow, widower or surviving civil partner), jobseeker's allowance payable in accordance with section 148A of the Principal Act and a payment referred to in paragraph (b) or (c) of the definition of "relevant payment" in section 178(1) of the Principal Act, on 16 March 2017,

(e) in so far as it relates to carer's allowance -