7. In paragraph 6—
(a)“age next birthday at the notional commencement of pension contributions under the 1988 Regulations ”, means the age he would attain on the birthday following the date on which he would have attained an exact age determined by subtracting the length of his qualifying service under the 1988 Regulations from his exact age on the date when he commenced paying contributions under these Regulations, and
(b)“qualifying service” and “qualifying service under the 1988 Regulations” mean the period in years he was entitled to reckon as pensionable service under the 1988 Regulations, except that where some or all of the service he was so entitled to reckon was part-time service it means the period in years he would have been entitled to reckon as pensionable service if in any period of part-time service he had served full-time.