In preparation for the March 18, 2015 regional test, FEMA has supplied the MAB with specific-unit instructions on how to add the NPT event code to the various EAS units that may be in stations throughout the state.
Once you've added the NPT event code to your device, you may leave it active. At some future point, it will be required for mandatory tests of IPAWS, pending current FCC rulemaking.
All documents are PDF. Click on a manufacturer name to view/download.