(a) A staff member shall retire under article 28 of the Regulations of the United Nations Joint Staff Pension Fund at the end of the last day of the month in which he or she reaches the age of 62 years.
(a) 根据《联合国合办工作人员养恤基金条例》第28条，工作人员在其年满62岁的当月的最后一天退休。