An employee who presents a complaint of unfair dismissal alleging that the dismissal is unfair by virtue of section 152 may apply to the tribunal for interim relief.
The tribunal shall not entertain an application for interim relief unless it is presented to the tribunal before the end of the period of seven days immediately following the effective date of termination (whether before, on or after that date).
In a case where the employee relies on section 152(1)(a), (b) or (ba), or on section 152(1)(bb) otherwise than in relation to an offer made in contravention of section 145A(1)(d), the tribunal shall not entertain an application for interim relief unless before the end of that period there is also so presented a certificate in writing signed by an authorised official of the independent trade union of which the employee was or proposed to become a member stating—
An "authorised official" means an official of the trade union authorised by it to act for the purposes of this section.
A document purporting to be an authorisation of an official by a trade union to act for the purposes of this section and to be signed on behalf of the union shall be taken to be such an authorisation unless the contrary is proved; and a document purporting to be a certificate signed by such an official shall be taken to be signed by him unless the contrary is proved.
For the purposes of subsection (3) the date of dismissal shall be taken to be—