Per US Customs’ CSMS #15-000623:
Last week, [CBP] initiated the first Phase (I) of the PGA Pilots. [FDA] and [NHTSA] entry data transactions were successfully transmitted, accepted and processed in [ACE]. The second Phase (II) of the PGA Pilots is scheduled to begin on September 2, 2015, with an expansion to additional ports.
In advance of the November 1, 2015 ACE mandatory filing date, CBP has also published a comprehensive overview of the schedule of PGAs and ports participating in the PGA Pilot.