20 C.F.R. § 220.163 Employee penalty deductions.
Title 20 - Employees' Benefits
If the employee earns over $400 in a month and does not report it within the time limit shown in §220.162(b), a penalty is imposed. The penalty deduction for the first failure to report equals the annuity amount for the first month in which the employee earned over $400. The deduction for a second or later failure to report equals the annuity amount for each month in which the employee earned over $400 and failed to report it on time.
Title 20: Employees' Benefits
PART 220—DETERMINING DISABILITY
Subpart M—Disability Annuity Earnings Restrictions
§ 220.163 Employee penalty deductions.

