DT: Luxembourg: double taxation agreement, Article 23: Capital
(1) Capital represented by immovable property, as defined in paragraph (2) of Article 6, may be taxed in the Contracting State in which such property is situated.
(2) Capital represented by movable property forming part of the business property of a permanent establishment of an enterprise, or by movable property pertaining to a fixed base used for the performance of professional services, may be taxed in the Contracting State in which the permanent establishment or fixed base is situated.
(3) Ships and aircraft operated in international traffic and boats engaged in inland waterways transport, and movable property pertaining to the operation of such ships, aircraft and boats, shall be taxable only in the Contracting State in which the place of effective management of the enterprise is situated.
(4) All other elements of capital of a resident of a Contracting State shall be taxable only in that State.