(1) The trustee of an accumulation fund or an approved deposit fund that maintains reserves must determine the investment return to be credited or debited from time to time to a member's benefit (or benefits of a particular kind) in the fund, having regard to:
(a) the return to the fund on investments; and
(b) the extent to which the costs of the fund exceed (or fall below) the aggregate of the costs charged to member's benefits under regulation 5.02; and
(c) the level of the reserves of the entity.
(2) Subject to regulation 5.01B and Division 6.1, the trustee of a regulated superannuation fund or an approved deposit fund must determine the investment return to be credited or debited to a member's benefits (or benefits of a particular kind) in a way that is fair and reasonable as between:
(a) all the members of the fund; and
(b) the various kinds of benefits of each member of the fund.