Pub. L. 88-643, tit. II, pt. D, sec. 235
mandatory retirement
mandatory retirement Sec. 235. (a) The Director may in his discretion place in a retired status any participant who has completed at. least twenty-five years of service, or who is at least fifty years of age and has completed at least twenty years of service, provided such participant has not less than ten years of service with the Agency of which at least five shall have been qualifying service. If so retired, such participant shall receive retirement benefits in accordance with the provisions of section 221. (b) Any participant in the system receiving compensation at the rate of grade GS–18 or above shall be automatically separated from the Agency upon reaching the age of sixty-five. Any participant in the system receiving compensation at a rate less than grade GS–18 shall be automatically separated from the Agency upon reaching the age of sixty. Such separation shall be effective on the last day of the month in which a participant reaches age sixty or sixty-five, as specified in this section, but whenever the Director shall determine it to be in the public interest, he may extend such participant’s service for a period not to exceed five years. A participant separated under the provisions of this section who has completed five years of Agency service shall receive retirement benefits in accordance with the provisions of section 221 of this Act.