From a notice posted by Social Security in the Federal Register:
By this notice we are rescinding the following [Social Security Rulings]:
- SSR 83-33: Titles II and XVI: Determining Whether Work Is Substantial Gainful Activity--Employees;
- SSR 83-34: Titles II and XVI: Determining Whether Work Is Substantial Gainful Activity--Self-Employed Persons;
- SSR 83-35: Titles II and XVI: Averaging of Earnings in Determining Whether Work Is Substantial Gainful Activity;
- SSR 84-25: Titles II and XVI: Determination of Substantial Gainful Activity If Substantial Work Activity Is Discontinued or Reduced--Unsuccessful Work Attempt; and
- SSR 84-26: Titles II and XVI: Deducting Impairment-Related Work Expenses From Earnings In Determinations As To Substantial Gainful Activity Under Titles II And XVI And As To Countable Earned Income Under Title XVI. ….
The stated reason for rescinding the SSRs is that subsequent regulations have superseded them.