The Vehicular Integration for Command, Control, Communications, Computers, Intelligence, and Surveillance/Electronic Warfare (C4ISR/EW) Interoperability (VICTORY) Standard provides an open architecture and technical specifications to promote sharing and reuse of resources within the military ground vehicle (MGV). The VICTORY Access Control Framework (VACF) provides services and mechanisms for protecting many of these shared-resources through the adoption of standards such as Security Attribute Markup Language (SAML) and eXtensible Access Control Markup Language (XACML). These technologies are typically used for securing an Enterprise Architecture and no fundamental issues appear to preclude their successful use within a MGV. However, despite consistent demand and pressure from Program Managers, and the successful deployment of many other VICTORY components, there has been no successful demonstration of these security components in an integrated vehicular environment. This paper presents a brief overview of the VACF and possible solutions for overcoming the practical challenges associated with implementing it in a MGV.