Here's my issue with the proposal, and the reason I voted against:
South St Maarten wrote:7: Acknowledges that many direct international routes between two nations have multiple stops in each of those nations, and thereby rules that:
- The preclearance station must be located at the endmost stop in a nation before entering the nation that the preclearance station is for;
- The vehicle of transport, once departed from the airport, airfield, train station, port, or harbor that the preclearance station is located at, must travel directly to the nation that the preclearance station has been designated for without stopping, pardoning an emergency;
Together, these two subclauses mandate that the preclearance station can only be at the last stop before leaving the departure nation, causing an unnecessary delay while all through passengers disembark, get checked, and reembark, which depending on the mode of transport can easily take half an hour, or longer.
If we look at the (fictional) example of the Eurostar trains, connecting the (fictional) nations of France and England, France operates 3 preclearance stations in England, and England operates the same number in France, plus additional ones in the (fictional) nations of Belgium, and Holland.
Since the trains connects the English capital with the capitals of the other nations, preclearance stations are located at each mentioned capital, as well as all intermediate stops.
There is however one line that originates in the South of France, where there are no preclearance stations, and this train is forced to stop at the (fictional) French city of Lille, where all passengers with destinations in England go through the procedure I described above, causing the train to halt at the (fictional) station of Lille-Europe for 30 minutes.
In short, I think it is not wise to mandate only one preclearance station at the end of the line, but allow for other preclearance stations on a line as well.