Members of the National Association of Broadcasters met with Federal Communications Commission staff recently to urge the FCC to change the rules on the operation of unlicensed devices on unoccupied channels — an issue the NAB has been pushing since last year. “The commission should either adopt and enforce effective rules that will allow TVWS devices to coexist with licensed operations, or it should eliminate or suspend TVWS operations,” NAB wrote in an ex parte filing.