A person who has power to grant, renew or extend a qualification or authorisation that (whether by itself or together with other qualifications or authorisations) is needed for, or facilitates, the practice of a profession, or the carrying on of a trade or business must not discriminate against another person—
(a) in any variation of the terms on which a qualification or authorisation was granted, renewed or extended; or
(b) in revoking or withdrawing a qualification or authorisation or failing to do so; or
(c) by treating the other person unfavourably in any way in connection with the grant, renewal or extension of a qualification or authorisation.