This document defines a new and significantly enhanced approach to the management of high-hazard tasks. The criteria for PTW have been extended and clarified, and the process for managing work under a PTW more clearly specified. Roles and responsibilities have been clarified, with a stronger emphasis on capability building, and the process for authorizing PTW Issuers. The role of PTW itself has also been clarified within the context of a new model for assessing and managing high-hazard jobs, and linked to the use of risk-prediction.