The 2016 UNIDIR FM(C)T Meeting Series explored in depth the issues that were identified in the course of the discussions held at the Group of Governmental Experts that considered aspects of a future treaty. The objective of the series is to help all participants of the FM(C)T deliberations to examine the challenges as well as the technical solutions that may be available to address them. This report presents the first meeting of the series, which examined the structure and basic elements of the treaty, future directions of research in support of the treaty, and a potential ban on production of all weapon-usable fissile materials.