Pb-free materials are considered a major technology disruption to traditional Pb-based interconnect materials for electronics, which is of particular concern for the aerospace & defense industries where safety cannot be compromised and applicable reliability data remains scarce. Until validated data and modelling methods are developed, projects considering Pb-free Aerospace & Defense products and systems need to adopt additional steps, many of which add cost and scheduling. Within the IPC-WP-014A white paper the PERM Council provides key recommendations that offer a way to approach Pb-free deployment in Aerospace & Defense products and systems to assist in maintaining product safety, affordability and sustainability. The IPC-WP-014 revision A white paper provides updated information on the effort to secure U.S. federal funding for Pb-free research and development in creating validated modelling methods.