20 C.F.R. § 229.54 Reduction for social security benefit paid to employee on another person's earnings record.
Title 20 - Employees' Benefits
The employee PIA amount under the overall minimum, after any age reduction, is reduced, but not below zero, by the amount of any social security benefit being paid to the employee on another person's earnings record.
Title 20: Employees' Benefits
PART 229—SOCIAL SECURITY OVERALL MINIMUM GUARANTEE
Subpart F—Computation of the Overall Minimum Rate
§ 229.54 Reduction for social security benefit paid to employee on another person's earnings record.