In case of aircraft registered in other Contracting States, which are not engaged in schedule international services, and which are making flights across the territory of a Contracting State or stopping for non traffic purposes, such Contracting State shall accept the information contained in a flight plan as adequate advance notification. This information is to be received:
at least 12 hours in advance of the expected ETA
at least 2 hours in advance of arrival
at least 1 hour in advance of arrival
at least 4 hours in advance of arrival