Which, to me, is the point of the border checks. The country can request all the information it wants at this time from people who want to enter and refuse admi

Which, to me, is the point of the border checks. The country can request all the information it wants at this time from people who want to enter and refuse admission if they do not comply (or if it does not like what is sees). But this is separate from airline tickets, passenger manifests, etc.