Although simple epedigree systems are an important first step, significant improvement in public safety would result from a more standardized and automated approach. The larger and more difficult task of providing for an Automated Epedigree System has been suggested, but not required by any state. Such a system would require fairly significant changes to supply chain companies' data interchanges and would certainly require advanced Track and Trace technology (with bar codes or RFID). The requirements that come closest to an Automated Epedigree System have been proposed by California. In March 2008, the California Board of Pharmacy (CBOP) published its "E-Pedigree Requirements" which are scheduled to go into effect in a phased approach between 2015-2017 (since abandoned). CBOP has proposed an XML standard document and the law requires an "interoperable electronic system".