The Voice of America has been operating since 1942: http://www.insidevoa.com/p/5831.html
H.R. 5181 establishes a Global Engagement Center, funds it, creates an official in charge of it who works for the Board of Broadcasting Governors and makes them immune to civil law.
With the passage of the resolution, the Executive Branch is empowered to reinterpret prior domestic propaganda protections so that American citizens that do not believe official US narrative can be engaged/targeted by influence operations.