20 C.F.R. § 410.540 Reductions; more than one reduction event.
Title 20 - Employees' Benefits
If a reduction for receipt of State benefits (see §410.520) and a reduction on account of excess earnings (see §410.530) are chargeable to the same month, the benefit for such month is first reduced (but not below zero) by the amount of the State benefits (as determined in accordance with §410.520(c)), and the remainder of the benefit for such month, if any, is then reduced (but not below zero) by the amount of excess earnings chargeable to such month.
Title 20: Employees' Benefits
PART 410—FEDERAL COAL MINE HEALTH AND SAFETY ACT OF 1969, TITLE IV—BLACK LUNG BENEFITS (1969– )
Subpart E—Payment of Benefits
§ 410.540 Reductions; more than one reduction event.