On September 17, 2025, APCO filed reply comments with the Federal Communications Commission (FCC) in response to its Further Notice of Proposed Rulemaking on improving interoperability and reliability for NG9-1-1. Building on initial comments filed in August, APCO called for covered 9-1-1 service providers to be defined by their role in delivering and supporting 9-1-1 communications, urged the adoption of reliability and interoperability requirements, including real-world testing, to ensure these features are built into NG9-1-1 networks from the start, and reiterated support for a standard definition of interoperability so that all stakeholders can work from a shared understanding of what interoperability means. APCO looks forward to continuing to work with the FCC and other stakeholders to facilitate the transition to NG9-1-1 nationwide.