66 Complaint of infringement of right.E+W+S
(1)An individual who claims that he has been unjustifiably disciplined by a trade union may present a complaint against the union to an industrial tribunal.
(2)The tribunal shall not entertain such a complaint unless it is presented—
(a)before the end of the period of three months beginning with the date of the making of the determination claimed to infringe the right, or
(b)where the tribunal is satisfied—
(i)that it was not reasonably practicable for the complaint to be presented before the end of that period, or
(ii)that any delay in making the complaint is wholly or partly attributable to a reasonable attempt to appeal against the determination or to have it reconsidered or reviewed,
within such further period as the tribunal considers reasonable.
(3)Where the tribunal finds the complaint well-founded, it shall make a declaration to that effect.
(4)Where an individual who is, or is seeking to be, in employment to which section 174 applies (employment subject to union membership agreement) is refused membership of, or is expelled from, a union in pursuance of a determination which infringes his right not to be unjustifiably disciplined, he may not present a complaint under this section but the refusal or expulsion shall be regarded as unreasonable for the purposes of that section.