Prudential Regulation Authority Rulebook

2.1

1. (1) Subject to (2), a firm must establish its mathematical reserves using a prospective actuarial valuation on prudent assumptions of all future cash flows expected to arise under, or in respect of, each of its contracts of long-term insurance.
2. (2) A firm may use a retrospective actuarial valuation where:
1. (a) a prospective method cannot be applied to a particular type of contract; or
2. (b) the firm can demonstrate that the resulting amount of the mathematical reserves would be no lower than would be required by a prudent prospective actuarial valuation.