The Customs and Border Protection Office is located at 26 E. Palatine Road, between Milwaukee and Wolf Roads, in the southwest corner of the airfield.
A request for CBP clearance must be made in advance by speaking with the Duty Officer. An APIS transmission or voicemail will not suffice. Arrangements for flights intending to arrive outside of the posted hours must be made by 5:00 PM on the prior business day. This includes weekends and holidays.