(1) For the purposes of calculating the lump sum benefit to be paid to a contributor who at any time was employed otherwise than on a full-time basis, his or her length of service as such a contributor is to be adjusted to full-time equivalent service.(2) For the purpose of calculating the lump sum or pension benefit to be paid to a contributor who, during the final 3 years of service was employed otherwise than on a full-time basis, his or her salary is taken to be the salary that the contributor would have received if he or she had been employed on a full-time basis during that period of service.