Mobile Grid Services have given the ability to move jobs, data and application software from nodes to nodes during jobs' execution in the grid environment. They have also solved some of the lack in finding suitable resources for the jobs. To facilitate the ability to support mobile resource sharing between multiple heterogeneous Virtual Organizations (VOs), an authorization policy management framework is needed to support authorization for heterogeneous authorization systems. Traditional authorization policy management frameworks act well in authorization policy for a single VO where the contributing hosts grant the permission to follow a global authorization system. However most of policy management tools do not provide a clear support for sharing mobile resources between multiple heterogeneous VOs. To solve this problem, we present in this book a dynamic and heterogeneous policy management framework that can give a clear policy definition about the ability to move jobs, data and application software from nodes to nodes during jobs' execution in the grid environment.