Many pilots will be flying into Oshkosh for AirVenture from other countries, particularly Canada. Each of those pilots will need to make an online electronic eAPIS notification filing with U.S. Customs and Border Protection, and a visit to AirVenture can raise some interesting questions about exactly how to fill out the eAPIS form.
The eAPIS acronym stands for "Electronic Advance Passenger Information System" and each pilot in command must use the CBP's website to file an eAPIS manifest before entering or departing the U.S. The eAPIS manifest must be submitted no less than 60 minutes before departure headed into or out of the U.S.
The eAPIS program is intended to give Customs advance information on any aircraft and the passengers onboard, including crucial information such as passport numbers, birthdates, home addresses, and so on. One of the questions on the eAPIS form is an address for your stay while in the U.S. If you are camping under your wing at AirVenture, what's the address? Is just reporting "AirVenture" or "Oshkosh" enough?
No, says Customs. In an advisory issued this week Customs asks all pilots who are flying to AirVenture from outside the U.S. with plans to camp on the field to enter the Wittman Regional Airport address for their stay. That address is 525 W. 20th Avenue, Oshkosh, WI 54902. No need to report if you are camping in the North 40, or Vintage area, or any other details.
Another potentially confusing aspect of the eAPIS form for an AirVenture visit is on departure when you enter your departure airport. Obviously, you will take off from Wittman Regional Airport, but that's not the "airport of departure" CBP wants. Though it is totally legal and okay to depart from anywhere, Customs maintains only a rather short list of "departure" airports and in this case the closest airport on that list is Green Bay, so you should enter KGRB in eAPIS form as the departure airport.
However, there is also a question about your actual departure location and in this case that would be KOSH, for Oshkosh. I know, it makes no sense and is actually impossible to depart from two separate airports, but that's how the system works.
For complete information on eAPIS requirements and how to register, visit the CBP website. EAA also strongly recommends reading the Private Pilot Air APIS Guide, the "how-to" manual for the eAPIS system.