of Polish or of any other more favoured nationality, origin, importation, starting point, or ownership as regards facilities, restrictions and all other matters.
Goods in transit shall be exempt from all customs or other similar duties.
Freedom of transit will extend to telegraphic and telephonic services under the conditions laid down by the conventions referred to in Article 98.
Article 90.
Poland undertakes to permit for a period of fifteen years the exportation to Germany of the products of the mines in any part of Upper Silesia transferred to Poland in accordance with the present Treaty.
Such products shall be free from all export duties or other charges or restrictions on exportation.
Poland agrees to take such steps as may be necessary to secure that any such products shall be available for sale to purchasers in Germany on terms as favourable as are applicable to like products sold under similar conditions to purchasers in Poland or in any other country.
Article 91.
German nationals habitually resident in territories recognised as forming part of Poland will acquire Polish nationality ipso facto and will lose their German nationality.
German nationals, however, or their descendants who became resident in these territories after January 1, 1908, will not acquire Polish nationality without a special authorisation from the Polish State.
Within a period of two years after the coming into force of the present Treaty, German nationals over 18 years of age habitually resident in any of the territories recognised as forming part of Poland will be entitled to opt for German nationality.
Poles who are German nationals over 18 years of age and habitually resident in Germany will have a similar right to opt for Polish nationality.
Option by a husband will cover his wife and option by parents will cover their children under 18 years of age.
Persons who have exercised the above right to opt may within the succeeding twelve months transfer their place of residence to the State for which they have opted.
They will be entitled to retain their immovable property in the territory of the other State where they had their place of residence before exercising the right to opt.
They may carry with them their movable property of every description. No export or import duties or charges may be imposed upon them in connection with the removal of such property.
Within the same period Poles who are German nationals and are in a foreign country will be entitled, in the absence of any provisions to the contrary in the foreign law, and if they have not acquired the foreign nationality, to obtain Polish nationality and to lose their German nationality by complying with the requirements laid down by the Polish State.
In the portion of Upper Silesia submitted to a plebiscite the provisions of this Article shall only come into force as from the definitive attribution of the territory.
Article 92.
The proportion and the nature of the financial liabilities of Germany and Prussia which are to be borne by Poland will be determined in accordance with Article 254 of Part IX (Financial Clauses) of the present Treaty.
There shall be excluded from the share of such financial liabilities assumed by Poland that portion of the debt which, according to the finding of the Reparation Commission referred to in the above-mentioned Article, arises from measures adopted by the German and Prussian Governments with a view to German colonisation in Poland.
