COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Emergency Equipment AD/EMY/5 Amdt 1 Life Jackets - Modification 11/67 Applicability: All RFD 50C series or type 72 fitted with "twist to lock" valves or valves requiring action before topping up. Document: 1. RFD Mod. No. 862, Issue 2; or 2. RFD Mod. No. 734; or 3. RFD Mod. No. 911. Compliance: Forthwith.