The EO references a 2019 EO.
I, DONALD J. TRUMP, President of the United States of America, find that additional steps must be taken to deal with the national emergency with respect to the information and communications technology and services supply chain declared in Executive Order 13873 of May 15, 2019 (Securing the Information and Communications Technology and Services Supply Chain). Specifically, the pace and pervasiveness of the spread in the United States of certain connected mobile and desktop applications and other software developed or controlled by persons in the People’s Republic of China, to include Hong Kong and Macau (China), continue to threaten the national security, foreign policy, and economy of the United States. At this time, action must be taken to address the threat posed by these Chinese connected software applications.
This executive order tasks the Secretary of Commerce to identify prohibited transactions involving eight Chinese software applications, including payment services; directs the Secretary of Commerce to identify and take appropriate action against other software applications; and develops a program to control the export of exploitable United States user data to foreign adversaries.
The EAS is a national public warning system that enables the President to communicate via live audio transmission to the public during a national emergency.5 EAS Participants must transmit Presidential messages during national emergencies
https://www.radioworld.com/wp-content/uploads/2021/01/DA-21-10A1.pdf
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