Senate Bill 400 aims to establish restrictions on the use of electronic devices owned, operated, or leased by state agencies or local governmental units in Wisconsin. The bill prohibits officials, employees, or contractors from downloading, using, or accessing social media applications or software from entities located in designated "foreign countries of concern," which currently include China, Cuba, Iran, North Korea, Russia, and Venezuela. The only exceptions to this prohibition are for law enforcement officers using devices for law enforcement purposes and for individuals who obtain a written waiver from the secretary of administration for specific duties.

The bill defines "foreign country of concern" as a foreign adversary designated by the U.S. Department of Commerce and outlines the definitions of state agencies and local governmental units. It also grants the secretary of administration the discretion to issue waivers for limited purposes related to the performance of duties, allowing some flexibility in the enforcement of these restrictions.