"11. Trade Unions etc (1) This section applies to an organisation of workers, an organisation of employers, or any other organisation whose members carry on a particular profession or trade for the purposes of which the organisation exists. (2) It is unlawful for an organisation to which this section applies, in the case of a person who is not a member of the organisation, to discriminate against him- (a) in the terms on which it is prepared to admit him to membership; or (b) by refusing, or deliberately omitting to accept, his application for membership. (3) It is unlawful for an organisation to which this section applies, in the case of a person who is a member of the organisation, to discriminate against him- (a) in the way it affords him access to any benefits, facilities or services, or by refusing or deliberately omitting to afford him access to them; or (b) by depriving him of membership, or varying the terms on which he is a member; or (c) by subjecting him to any other detriment."