[Excerpt] The purpose of the report is to provide historical and background information that helps explain how FEHBP has evolved into the program it is today. This report focuses solely on changes made to FEHBP through legislative action. Policymakers may use this report to understand how Congress has interacted with FEHBP in the past, and to inform its future interactions with FEHBP. Specifically, the report includes short discussions of how Congress has effected and maintained policy changes to FEHBP by restricting the use of federal funds; changed the formula for determining the government’s share of FEHBP premiums; expanded eligibility for the program; and implemented policies that affect the relationship between Medicare and FEHBP. The Appendix includes detailed summaries of selected laws or provisions of laws that have directly amended or otherwise changed FEHBP.