; and (B) the use of covered applications on the Department of Defense Information Network on personal devices. (2) Covered applications defined In this subsection, the term covered applications means the social networking service TikTok or any successor application or service developed or provided by ByteDance Limited or an entity owned by ByteDance Limited. 1717. Security enhancements for the nuclear command, control, and communications network (a) Required establishment of cross-functional team (1) In general Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense shall establish a cross-functional team, in accordance with section 911(c) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328