CFR > Title 20 - Employees' Benefits > CHAPTER II—RAILROAD RETIREMENT BOARD > SUBCHAPTER B—REGULATIONS UNDER THE RAILROAD RETIREMENT ACT (parts 201 to 295) > PART 225—PRIMARY INSURANCE AMOUNT DETERMINATIONS > SUBPART C—PIA's Used in Computing Survivor Annuities and the Amount of the Residual Lump-Sum Payable (§225.20 to §225.26) > 225.21—Survivor Tier I PIA.

225.21—Survivor Tier I PIA.

The Survivor Tier I PIA is used in computing the tier I component of a survivor annuity. This PIA is determined in accordance with section 215 of the Social Security Act using the deceased employee's combined railroad and social security earnings after 1950 (or after 1936 if a higher PIA would result) through the date of the employee's death.