(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 full consideration in money or money ' s worth. Government service (1) (a) Remuneration, other than a pension, paid by a Contracting State or a political subdivision or a local authority thereof to an individual in respect of services rendered to that State or subdivision or authority shall be taxable only in that State. (b) However, such remuneration shall be taxable only in the other Contracting State if the services are rendered in that other State and the individual is a resident of that State who: (i) is a national of that State; or (ii) did not become a resident of that State solely for the purpose of rendering the services. (2) (a) Any pension paid by, or out of funds created by, a Contracting State or a political subdivision or a local authority thereof to an individual in respect of services rendered to that State or subdivision or authority shall be taxable only in that State. (b) However, such pension shall be taxable only in the other Contracting State if the individual is a resident of, and a national of, that State.