Paragraph 4
(1)
The Treasury may by regulations made by statutory instrument—
(a)
amend paragraph 3(6)(b)(i) by substituting a different amount for the one that is for the time being specified there;
(b)
amend paragraph 3(6)(b)(ii) by substituting a different percentage for the one that is for the time being specified there.
(2)
A statutory instrument containing regulations under this paragraph—
(a)
is subject to annulment in pursuance of a resolution of the House of Commons, if the regulations increase the specified amount by no more than is necessary to reflect changes in the value of money;
(b)
otherwise, may not be made unless a draft of the instrument has been laid before and approved by a resolution of the House of Commons.