Article 28 Signature and entry into force of the Convention

This Convention shall be open for signature by the member States of the Council of Europe and the Member countries of OECD. It is subject to ratification, acceptance or approval. Instruments of ratification, acceptance or approval shall be deposited with one of the Depositaries.

This Convention shall enter into force on the first day of the month following the expiration of a period of three months after the date on which five States have expressed their consent to be bound by the Convention in accordance with the provisions of paragraph 1.

In respect of any member State of the Council of Europe or any Member country of OECD which subsequently expresses its consent to be bound by it, the Convention shall enter into force on the first day of the month following the expiration of a period of three months after the date of the deposit of the instrument of ratification, acceptance or approval.

Any member State of the Council of Europe or any member country of OECD which becomes a Party to the Convention after the entry into force of the Protocol amending this Convention, opened for signature on the 27th day of May 2010 (the “2010 Protocol”), shall be a Party to the Convention as amended by that Protocol, unless they express a different intention in a written communication to one of the Depositaries.

After the entry into force of the 2010 Protocol, any State which is not a member of the Council of Europe or of the OECD may request to be invited to sign and ratify this Convention as amended by the 2010 Protocol. Any request to this effect shall be addressed to one of the Depositaries, who shall transmit it to the Parties. The Depositary shall also inform the Committee of Ministers of the Council of Europe and the OECD Council. The decision to invite States which so request to become Party to this Convention shall be taken by consensus by the Parties to the Convention through the co-ordinating body. In respect of any State ratifying the Convention as amended by the 2010 Protocol in accordance with this paragraph, this Convention shall enter into force on the first day of the month following the expiration of a period of three months after the date of deposit of the instrument of ratification with one of the Depositaries.

The provisions of this Convention, as amended by the 2010 Protocol, shall have effect for administrative assistance related to taxable periods beginning on or after 1 January of the year following the one in which the Convention, as amended by the 2010 Protocol, entered into force in respect of a Party, or where there is no taxable period, for administrative assistance related to charges to tax arising on or after 1 January of the year following the one in which the Convention, as amended by the 2010 Protocol, entered into force in respect of a Party. Any two or more Parties may mutually agree that the Convention, as amended by the 2010 Protocol, shall have effect for administrative assistance related to earlier taxable periods or charges to tax.

Notwithstanding paragraph 6, for tax matters involving intentional conduct which is liable to prosecution under the criminal laws of the applicant Party, the provisions of this Convention, as amended by the 2010 Protocol, shall have effect from the date of entry into force in respect of a Party in relation to earlier taxable periods or charges to tax.