[Code of Federal Regulations] [Title 20, Volume 2] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 20CFR404.133] [Page 66-67] TITLE 20--EMPLOYEES' BENEFITS CHAPTER III--SOCIAL SECURITY ADMINISTRATION PART 404_FEDERAL OLD-AGE, SURVIVORS AND DISABILITY INSURANCE (1950 ) --Table of Contents Subpart B_Insured Status and Quarters of Coverage Sec. 404.133 When we give you quarters of coverage based on military service to establish a period of disability. For purposes of establishing a period of disability only, we give you quarters of coverage (QCs) for your military service before 1957 (see subpart N of this part). We do this even though we may not use that military service for other purposes of title II of the Act because a periodic benefit is payable from another Federal agency based in whole or in part on the same period of military service. [[Page 67]] Quarters of Coverage