Section 19 | Discrimination by persons with statutory power to select employees for others.
From legislation.gov.uk
It shall be unlawful for a person who is empowered by virtue of an enactment to select or nominate another person for employment by a third person to discriminate against a person, in relation to employment in Northern Ireland,—
(a)by refusing or deliberately omitting to select or nominate him for employment, or
(b)where candidates are selected or nominated in order of preference, by selecting or nominating him lower in order than any other who is selected or nominated.