The Secretary-General shall fix the salary scales for staff members in the General Service and related categories, normally on the basis of the best prevailing conditions of employment in the locality of the United Nations Office concerned, provided that the Secretary-General may, where he or she deems it appropriate, establish rules and salary limits for payment of a non-resident allowance to General Service staff members recruited from outside the local area. The gross pensionable remuneration of such staff shall be determined in accordance with the methodology specified in article 54 (a) of the Regulations of the United Nations Joint Staff Pension Fund and are shown in the salary scales applicable to such staff.