TITLE 20--EMPLOYEES' BENEFITS CHAPTER II--RAILROAD RETIREMENT BOARD PART 229_SOCIAL SECURITY OVERALL MINIMUM GUARANTEE--Table of Contents Subpart I_Payment of Overall Minimum Rate Sec. 229.90 Proportionate shares of overall minimum. When both the employee and the spouse are entitled to annuities and the overall minimum rate is higher than the railroad formula rate, the overall minimum amount must be divided between the employee and spouse. The employee receives two-thirds of the total O/M rate. The spouse receives one-third of the total O/M rate.