The Treasury may by regulations—
amend this Part for the purpose of providing further relief, or further exemptions, from tax (whether by modifying an existing relief or exemption or otherwise);
amend or repeal any of sections 132 to 155 for purposes not falling within paragraph (a);
make any amendment of any other provision of this Part that may be necessary in consequence of provision under paragraph (b).
In subsection (1)—
the reference to providing further relief from tax includes the provision of relief for additional persons or categories of person or in additional cases or circumstances;
the reference to providing further exemptions from tax includes the provision of exemptions for additional persons or categories of person or in additional cases or circumstances.