Duty under this Chapter is not chargeable on an application to register a motor vehicle if—
(a) the applicant is a person who has served in the Defence Force or in any other armed forces of Her Majesty and who, as a result of that service—
(i) has lost a leg or both arms or has had a leg, or both arms, rendered permanently and wholly useless; or
(ii) is in receipt of a pension under Part II of the Veterans' Entitlements Act 1986 of the Commonwealth and is a veteran (within the meaning of that Part) to whom section 24 of that Act applies;
and the vehicle is for use for the person's own transportation; or
(b) the applicant is a person in respect of whom the Secretary to the Department of Social Security of the Commonwealth, or an officer appointed by the Secretary for the purpose, has certified that the person has lost the use of a leg or both legs to such an extent that he or she is permanently unable to use public transport and the vehicle is for use in transporting the person to and from gainful employment.