"superannuation pension amount "for a person who receives a pension for a week under a Commonwealth superannuation scheme means:
(a) if the scheme identifies a part of the pension as attributable to the
contributions made under the scheme by the Commonwealth, a Commonwealth
authority or a licensed corporationthe amount of that part; or
(b) in any other case, either:
(i) the amount assessed by the Commission to be the part of the pension
that is attributable to the contribution made under the scheme by the
Commonwealth, a Commonwealth authority or a licensed corporation; or
(ii) if such an assessment cannot be madethe amount of the pension
received by the person for the week.