The purpose of the document is to provide non-mandatory guidance for the application of the United Nations Framework Classification for Resources 2009 (UNFC) to uranium and thorium resources. These Guidelines are intended to assist all those responsible for finding, classifying, quantifying, financing, permitting, mining, and processing these minerals such that they are fit to enter the nuclear fuel cycle. The Guidelines help to align the various resource classification systems currently in use for uranium and thorium resource management and reporting, such as the Organisation for Economic Cooperation and Development (OECD) Nuclear Energy Agency (NEA)/International Atomic Energy Agency (IAEA) ‘Red Book’ resource reporting scheme and various national systems, in a coherent and consistent manner.