22.— The Principal Act is amended—

(a) in section 173, by substituting the following for subsection (1):

“(1) Subject to this Act and to regulations made under this Act, a payment (in this Act referred to as ‘one-parent family payment’) shall be payable to a qualified parent who has not attained pensionable age.”,

and

(b) in section 174, by deleting subsections (3) and (4).