The NGI specification makes GAT functionality available through a network connection using an HTTP/REST interface and JSON message encoding. The GAT functionality is the same; the method for accessing it is different. The specification also includes new commands for requesting expected GAT results from a trusted source.
The NGI standard is considered open and available to the public for free. Non-Members, regulators and anyone with a general interest can request a copy by contacting the GSA Secretariat at email@example.com.