The requirement for a spouse annuity based on age depends on the employee's years of creditable railroad service, the employee's age, and your age. The employee must be receiving an annuity and you must file an application for your spouse annuity. When all eligibility requirements are met, a spouse annuity based on your age can begin as explained in Chart 1 and Chart 2.
Chart 3 explains Full Retirement Age.
Chart 1 - Age Requirements - Employee has at Least 360 Months of Railroad Service