Amends section 60102 of the Infrastructure Investment and Jobs Act (47 U.S.C. 1702) to add and reorganize definitions (including definitions for '9–1–1 request for emergency assistance', 'artificial intelligence', 'commonly accepted standards', 'emergency communications center', 'interoperability', 'internet exchange point', and 'Next Generation 9–1–1'), to replace and expand permissible uses to require eligible entities to use remaining BEAD allocations to establish competitive subgrant programs for specified 'eligible projects' (including AI-supportive telecommunications infrastructure, workforce development narrowly targeted to certain sectors, Next Generation 9–1–1 planning/implementation/maintenance, mapping/planning, permitting efficiency resources, and other Assistant Secretary-approved uses), and to add detailed priorities, matching and waiver rules, a mandatory public challenge process for certain wholesale fiber projects, limits on O&M funding (24 months; not to exceed 15% of the subgrant), interstate memorandum-of-agreement authority, and Assistant Secretary duties and coordination requirements for Next Generation 9–1–1. The amendment also preserves a specified Build America, Buy America waiver effective February 22, 2024, and requires issuance of guidance within 30 days of enactment.