Extraterritoriality is often extended to friendly or allied militaries, particularly for the purposes of allowing that military to simply pass through one's territory.
The presumption against extraterritoriality is a canon of statutory interpretation that provides that when a statute gives no clear indication of an extraterritorial application, it has none.
He suggested going as far as possible, unilaterally if necessary, in writing a new tariff treaty, and favored gradual relinquishment of extraterritoriality.