The Unique Device Identification (UDI) System is intended to assign a unique identifier to medical devices within the United States and Europe. It was signed into law on September 27, 2007, as part of the Food and Drug Administration Amendments Act of 2007. (The EU acted to adopt UDI and on April 5th, 2017, under the EU Medical Device Regulation (MDR) and In-vitro Diagnostic Regulation (IVDR), but adoption has been postponed; see Medical Device Regulation.)