It is unlawful for an authority or body that is empowered to confer, renew, extend, revoke or withdraw an authorisation or qualification that is needed for or facilitates the practice of a profession, the carrying on of a trade or the engaging in of an occupation to discriminate against a person on the ground of the person's disability:
(a) by refusing or failing to confer, renew or extend the authorisation or qualification; or
(b) in the terms or conditions on which it is prepared to confer the authorisation or qualification or to renew or extend the authorisation or qualification; or
(c) by revoking or withdrawing the authorisation or qualification or varying the terms or the conditions upon which it is held.