Chapter 65. Liability Risk Retention 15 U.S. Code §3901. Definitions 15 U.S. Code §3902. Risk retention groups 15 U.S. Code §3903. Purchasing groups 15 U.S. Code §3904. Securities laws 15 U.S. Code §3905. Clarification concerning permissible State authority 15 U.S. Code §3906. Injunctive orders issued by United States district courts