11. After article 2 (interpretation) insert—
2A.—(1) In the Scheme, the “service reduction percentage” in respect of a period of flexible service is given by the formula, expressed as a percentage—
where—
A is the basic pay which the member would have received in respect of that period of flexible service had the person not been serving on flexible terms;
B is the basic pay received by the person in respect of that period of flexible service.
(2) For the purposes of the Scheme, a period of flexible service ends and another begins when any change in the service reduction percentage occurs.”.