For the purpose of any action which may be brought within the United States or its Territories or possessions by or against the Fund or the Bank in accordance with the Articles of Agreement of the Fund or the Articles of Agreement of the Bank, the Fund or the Bank, as the case may be, shall be deemed to be an inhabitant of the Federal judicial district in which its principal office in the United States is located, and any such action at law or in equity to which either the Fund or the Bank shall be a party shall be deemed to arise under the laws of the United States, and the district courts of the United States shall have original jurisdiction of any such action. When either the Fund or the Bank is a defendant in any such action, it may, at any time before the trial thereof, remove such action from a State court into the district court of the United States for the proper district by following the procedure for removal of causes otherwise provided by law.