2 Guidelines on the Preparation of All Safety Cases.....................................................7 2.1 Who submits a Safety Case .................................................................................. 7 Level of Information Provision within Safety Case .................................................. 8 Availability and Access to Records ......................................................................... 8 Safety Case Structure ............................................................................................. 8 Update of an Approved Safety Case ....................................................................... 9 2.5.1 Material Change Guidance ................................................................................ 9 2.5.2 Performance Standard and Design Verification Requirements ........................ 10 2.5.3 Requirement fora New Design Safety Case .................................................... 11 2.5.4 Addendum to a Safety Case ............................................................................ 11