In this Part “flexible benefit”, in relation to a member of a pension scheme or a survivor of a member, means—
(a)a money purchase benefit,
(b)a cash balance benefit, or
(c)a benefit, other than a money purchase benefit or cash balance benefit, calculated by reference to an amount available for the provision of benefits to or in respect of the member (whether the amount so available is calculated by reference to payments made by the member or any other person in respect of the member or any other factor).