The purpose of this book is to assist individuals of Government agencies who generate or review classified documents to recognize the presence of nuclear information that is potentially classified as Restricted Data (RD) or Formerly Restricted Data (FRD). This book is particularly helpful to document reviewers conducting declassification reviews pursuant to Executive orders.

This book will not help you determine what is and what isn’t classified. It will enable you to identify subject areas and key words which may indicate the presence of classified DOE information.