This standard provides the requirements for presentation of emergency alerts when U.S. and Canadian users are roaming throughout the U.S. and Canada, when U.S. and Canadian users roam elsewhere in the world where 3GPP PWS-based alerting is supported, and when international roamers from beyond North America roam into North America with a 3GPP PWS-capable mobile device. This Standard supports the requirements of the FCC Report & Order 16-127 and the FCC Order on Reconsideration 17-143.