28.—(1) A complaint by any person (“the complainant”) that another person (“the respondent”)—
(a)has committed against the complainant an act to which this regulation applies; or
(b)is by virtue of regulation 22 (liability of employers and principals) or 23 (aiding unlawful acts) to be treated as having committed against the complainant such an act,
may be presented to an employment tribunal.
(2) This regulation applies to any act of discrimination or harassment which is unlawful by virtue of any provision of Part II other than—
(a)where the act is one in respect of which an appeal or proceedings in the nature of an appeal may be brought under any enactment, regulation 16 (qualifications bodies);
(b)regulation 20 (institutions of further and higher education); or
(c)where the act arises out of and is closely connected to a relationship between the complainant and the respondent which has come to an end but during the course of which an act of discrimination against, or harassment of, the complainant by the respondent would have been unlawful by virtue of regulation 20, regulation 21 (relationships which have come to an end).
(3) In paragraph (2)(c), reference to an act of discrimination or harassment which would have been unlawful includes, in the case of a relationship which has come to an end before the coming into force of these Regulations, reference to an act of discrimination or harassment which would, after the coming into force of these Regulations, have been unlawful.
(4) In this regulation, “enactment” includes an enactment comprised in, or in an instrument made under, an Act of the Scottish Parliament.