TREATIES [61 STAT. 1806 Article 18 Roumania shall not acquire or manufacture civil aircraft which are of German or Japanese design or which embody major assemblies of German or Japanese manufacture or design. Article 19 Each of the military, naval and air clauses of the present Treaty shall remain in force until modified in whole or in part by agreement between the Allied and Associated Powers and Roumania or, after Roumania becomes a member of the United Nations, by agreement between the Security Council and Roumania. SECTION II Article 20 1. Roumanian prisoners of war shall be repatriated as soon as pos- sible, in accordance with arrangements agreed upon by the individual Powers detaining them and Roumania. 2. All costs, including maintenance costs, incurred in moving Rou- manian prisoners of war from their respective assembly points, as chosen by the Government of the Allied or Associated Power concerned, to the point of their entry into Roumanian territory, shall be borne by the Rou- manian Government. PART IV WITHDRAWAL OF ALLIED FORCES Article 21 1. Upon the coming into force of the present Treaty, all Allied Forces shall, within a period of 90 days, be withdrawn from Roumania, subject to the right of the Soviet Union to keep on Roumanian territory such armed forces as it may need for the maintenance of the lines of communication of the Soviet Army with the Soviet zone of occupation in Austria.
�
