The Liability Insurance (including Self-Insurance), No-Fault Insurance, and Workers’ Compensation User Guide, Version 3.4 has been written for use by all Section 111 liability insurance (including self-insurance), no-fault insurance, and workers’ compensation Responsible Reporting Entities (RREs). The five chapters of the User Guide - referred to collectively as the “Section 111 NGHP User Guide” - provide information and instructions for the Medicare Secondary Payer (MSP) NGHP reporting requirements mandated by Section 111 of the Medicare, Medicaid and SCHIP Extension Act of 2007 (MMSEA) (P.L. 110-173).