4. After Article 63 of the Order there is inserted—
63A.—(1) This Article applies to any complaint presented under Article 63 to an industrial tribunal.
(2) Where, on the hearing of the complaint, the complainant proves facts from which the tribunal could, apart from this Article, conclude in the absence of an adequate explanation that the respondent—
(a)has committed an act of discrimination against the complainant which is unlawful by virtue of Part III, or
(b)is by virtue of Article 42 or 43 to be treated as having committed such an act of discrimination against the complainant,
the tribunal shall uphold the complaint unless the respondent proves that he did not commit or, as the case may be, is not to be treated as having committed, that act.”.