This is Article 13.
Entry and clearance regulations
The laws and regulations of a contracting State as to the
admission to or departure from its territory of passengers, crew
or cargo of aircraft, such as regulations relating to entry,
clearance, immigration, passports, customs, and quarantine
shall be complied with by or on behalf of such passengers,
crew or cargo upon entrance into or departure from, or while
within the territory of that State.
Anyone speak English (no offence legal approach)