Except as provided in the following provisions of this section and in section 9(1) of this Act (supplementary benefit paid after a return to full-time employment following a trade disputes), for any period during which a person is engaged in remunerative full-time work he shall not be entitled to supplementary benefit.

The Secretary of State may, by regulations made under this subsection, make provision for postponing the exclusion of persons becoming engaged in remunerative full-time work from a right to supplementary benefit under subsection (1) above for such period from the beginning of their engagement as may be specified in the regulations.

There is no exclusion from a right to supplementary benefit under subsection (1) above where the earning power of a self-employed person is, by reason of a disability, substantially reduced in comparison with that of other persons similarly occupied.

In this subsection " self-employed person" means a person engaged in any work otherwise than under a contract of service.