23.—(1) Where a person to whom these Regulations apply, after suffering loss of employment or diminution of emoluments as a regular fireman, enters employment in which he is subject to a pension scheme and thereafter becomes entitled to reckon for the purposes of that scheme any service or period of contribution which falls to be taken into account for the purpose of assessing the amount of any retirement compensation payable to him, his entitlement to retirement compensation shall be reviewed, and, subject to the provisions of this Regulation, no retirement compensation shall be payable in respect of that service or period unless the annual rate of the emoluments to which he was entitled immediately before the loss or diminution exceeds the annual rate on entry of the emoluments of the new employment, and any retirement compensation so payable to him shall, insofar as it is calculated by reference to remuneration, be calculated by reference to the difference between the said annual rates.
(2) The provisions of this Regulation shall not operate to increase the amount of any retirement compensation payable in respect of diminution of emoluments beyond the amount which would have been payable if the person had attained the age of compulsory retirement immediately before he ceased to hold the employment in which he suffered the diminution of emoluments.