As provided in the military clauses, Germany will not maintain any fortifications or armed forces less than fifty kilometers to the east of the Rhine, hold any manoeuvres, nor maintain any works to facilitate mobilization. In case of violation, "she shall be regarded as committing a hostile act against the Powers who sign the present treaty and as intending to disturb the peace of the world." "By virtue of the present treaty, Germany shall be bound to respond to any request for an explanation which the Council of the League of Nations may think it necessary to address to her." ALSACE-LORRAINE [Sidenote: Territories restored to France.] After recognition of the moral obligation to repair the wrong done in 1871 by Germany to France and the people of Alsace-Lorraine, the territories ceded to Germany by the Treaty of Frankfort are restored to France with their frontiers as before 1871, to date from the signing of the armistice, and to be free of all public debts. [Sidenote: How French citizenship may be acquired.] Citizenship is regulated by detailed provisions distinguishing those who are immediately restored to full French citizenship, those who have to make formal applications therefor, and those for whom naturalization is open after three years. The last named class includes German residents in Alsace-Lorraine, as distinguished from those who acquire the position of Alsace-Lorrainers as defined in the treaty. All public property and all private property of German ex-sovereigns passes to France without payment or credit. France is substituted for Germany as regards ownership of the railroads and rights over concessions of tramways. The Rhine bridges pass to France with the obligation for their upkeep. [Sidenote: Manufactured products to be admitted to Germany.] [Sidenote: Administration of Kehl and Strassbourg.] For five years manufactured products of Alsace-Lorraine will be admitted to Germany free of duty to a total amount not exceeding in any year the average of the three years preceding the war and textile materials may be imported from Germany to Alsace-Lorraine and re-exported free of duty. Contracts for electric power from the right bank must be continued for ten years. For seven years, with possible extension to ten, the ports of Kehl and Strassbourg shall be administered as a single unit by a French administrator appointed and supervised by the Central Rhine Commission. Property rights will be safeguarded in both ports and equality of treatment as respects traffic assured the nationals, vessels, and goods of every country. [Sidenote: Contracts, judgments of courts, political condemnations.]