ARTICLE 18
Pensions and Annuities
(1) Subject to the provisions of paragraph (2) of Article 19, pensions and other similar remuneration and annuities paid to a resident of a Contracting State in consideration of past employment shall be taxable only in that 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 full consideration in money or money's worth.