i3 version 3 was published in July 2021, alongside numerous other standards that were completed or will be completed around the same period. Version 3 brings numerous new features and fundamental changes to the overall architecture; chiefly, one of these is a move from SOAP / XML to REST / JSON for programmatic interfaces and data structures, which means that even functions that do not have any feature changes or additions may have a completely new interface. This means that many interactions that have been tested at previous events need to be re-evaluated at NENA's 10th NG9-1-1 Industry Collaboration Event (ICE).
Alongside i3v3, many other standards were also published at around the same time, and many are directly incorporated into i3. Considering that this presents a "next generation" of NG9-1-1, the ICE Steering Committee has chartered the 10th ICE to focus on testing implementations of new and updated features in i3 version 3, as well as other specifications that i3 incorporates or relies on.
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