Article 3 Period for service of questions
In proceedings before a tribunal, a question shall only be admissible as evidence in pursuance of section 56(3) of the Act—
(a)
where it was served before a complaint had been presented to a tribunal, if it was so served within the period of three months beginning when the act complained of was done;
(b)
where it was served after a complaint had been presented to a tribunal—
(i)
if it was served within the period of twenty one days beginning with the day on which the complaint was presented, or
(ii)
if it was served with the leave of a tribunal, within the period specified by that tribunal.