CFR > Title 20 - Employees' Benefits > CHAPTER II—RAILROAD RETIREMENT BOARD > SUBCHAPTER B—REGULATIONS UNDER THE RAILROAD RETIREMENT ACT (parts 201 to 295) > PART 216—ELIGIBILITY FOR AN ANNUITY > SUBPART G—Widow(er), Surviving Divorced Spouse, and Remarried Widow(er) Annuities (§216.60 to §216.68) > 216.64—What is required for payment.