The Secretary of State may by regulations in a statutory instrument increase or reduce any of the money sums for the time being specified in the following provisions of this Part—

• section 512(2),

• section 515(3),

• section 518(1)(a),

• section 542(4),

• section 622(3),

• section 624(1)(a) and (b), and

• paragraph 12 of Schedule 19.

Regulations shall not be made under this section unless a draft of the statutory instrument containing them has been approved by resolution of each House of Parliament.