Article 3 Period for service of questions — tribunal cases
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 served within the period of three months beginning when the act complained of was done or where the omission complained of first came to the attention of the complainant;
(b)
where it was served when a complaint had been presented to a tribunal, either if it was so served within the period of twenty-one days beginning with the day on which the complaint was presented or if it was so served later with leave given, and within a period specified, by a direction of a tribunal.