Article Title: CSRS: When Am I Eligible to Retire?
Snippet of Article: "...There are five categories of benefits under the Civil Service Retirement System (CSRS). Eligibility is based on your age and the number of years of creditable service and any other special requirements. In addition, you must have served in a position subject to CSRS coverage for one of the last two years before your retirement. If you meet one of the following sets of requirements, you may be eligible for an immediate retirement benefit. An immediate annuity is one that begins within 30 days after your separation..."
Source: www.opm.gov