ARTICLE 18
Pensions, Social Security Payments and Annuities
(1) Subject to the provisions of paragraph 2 of Article 19, pensions and other similar remuneration in consideration of past employment, annuities and payments under the Social Security legislation arising in a Contracting State and paid to a resident of the other Contracting State may be taxed in the first-mentioned Contracting State.
(2) The term 'annuity' means a stated sum payable periodically at stated times during life or during a specified or ascertainable period of time under an obligation to make the payments in return for adequate and frill consideration in money or money's worth.