A person (the member ) may choose a fund as described in section 11 if, and only if:
(a) the choice is made during a new scheme contribution period of the person; or
(b) the choice is made before the start of a new scheme contribution period of the person and at a time when:
(i) the person has been elected to the Senate, but his or her entitlement to parliamentary allowance as a senator has not yet commenced; or
(ii) the person has been chosen or appointed to hold the place of a senator in accordance with section 15 of the Constitution, but his or her entitlement to parliamentary allowance as a senator has not yet commenced.