ARTICLE 18
Pensions
(1) Subject to the provisions of paragraph (2) of Article 19, pensions and other similar remuneration paid to a resident of a Contracting State in consideration of past employment shall be taxable only in that Contracting State.
(2) Notwithstanding the provisions of paragraph (1), pensions paid and other similar payments made by the Government of a Contracting State or a local authority thereof under a public welfare scheme of the social security system of that Contracting State shall be taxable only in that Contracting State.