Text of the online post of the order:

ORDER as to Reza Zarrab, Camelia Jamshidy, Hossein Najafzadeh. A conference (arraignment) is hereby scheduled for Wednesday, April 27, 2016, at 10:00 a.m. in Courtroom 17B of the Daniel Patrick Moynihan Courthouse at 500 Pearl Street, New York, New York 10007. The assistant U.S. Attorneys are requested to notify counsel and the parties. (Signed by Judge Richard M. Berman on 4/26/2016)(bw)

Appears that all three defendants may be arraigned. But the order isn’t specific.  Here it is. 20160426 (13) Order on conference