Paragraph 7
Subject to paragraph 8, a person who ceases to be a pensionable employee for any other reason shall be entitled to reckon under regulation D13 as whole-time reckonable service an additional period calculated as—
where—
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X is the total amount paid by way of instalments;
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Y is the total sum payable by him under regulation C7(9); and
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Z is the length of the period of whole-time reckonable service which the person would have been entitled to reckon under regulation D13 if payment had been completed.