Jun 07 2017 Sixth meeting of Informal Working Group Four (IWG-4) Regulatory Issues 1:00 pm - 5:00 pm EDT Teleconference Toll Free number is 888 858-2144. Toll number is 646 746-3008 Access code is 3064585. Public Notice Contact Chip Fleming 202-418-1247 Sankar Persaud 202-418-2441 Larry Olson 202-418-2142 Allen Yang 202-418-0738 Tags: International Treaty Spectrum Allocation