ARTICLE 28

Entry into Force

1. This Convention shall be subject to ratification. The instruments of ratification shall be exchanged at as soon as possible.

2. The Convention shall enter into force on the first day of the second month following the exchange of instruments of ratification. Its provisions allocating taxation rights shall have effect, in respect of taxes withheld at source, for amounts paid or credited on or after the first day of the second month next following, and in respect of taxes on other income, for fiscal periods beginning on or after the first day of January next following, the date on which the Convention enters into force.

3. Where any greater relief from tax would have been afforded to a person entitled to the benefits of the Convention between the United States of America and the Republic of Austria with respect to taxes on income, signed in Washington on October 25, 1956 (hereinafter referred to as "the 1956 Convention") under that Convention than under this Convention, the 1956 Convention shall, at the election of such person, continue to have effect in its entirety for the first assessment period or taxable year following the date on which this Convention would otherwise have effect under the provisions of paragraph 2.

4. The 1956 Convention shall cease to have effect in respect of income to which this Convention applies in accordance with paragraphs 2 or 3 of this Article. The 1956 Convention shall terminate on the last date on which it has effect in accordance with the foregoing provisions of this Article.