3(1)The amendments made by section 16 of this Act shall not have effect in relation to an employee in whose case the relevant date (as defined in sub-paragraph (2)) falls before the commencement of that section.
(2)In sub-paragraph (1) “the relevant date means the date which for the purposes of section 81(4) of the 1978 Act is the relevant date in the case of the employee by virtue of any provision of section 90 of that Act.