Today new amendments to the [Multilateral Convention on Mutual Administrative Assistance in Tax Matters](http://www.oecd.org/document/14/0,3746,en_2649_33767_2489998_1_1_1_1,00.html) open the Convention to all countries, allowing them to benefit from cross border tax co-operation and information sharing. This takes place as the Global Forum on Transparency and Information Exchange for Tax Purposes is meeting in Bermuda to advance the implementation and peer review process for a transparent tax environment.
The updated Convention, which incorporates internationally agreed standards for exchange of information in tax matters, is the most comprehensive multilateral instrument available for tax co-operation. Like the original 1988 Convention, it provides a wide range of tools for cross-border tax co-operation including exchange of information, multilateral simultaneous tax examinations, service of documents, and cross-border assistance in tax collection, while imposing extensive safeguards to protect the confidentiality of the information exchanged.
In the past year 20 countries have signed the amended Convention and more, including both OECD and non-OECD, developing and developed countries, are expected to follow shortly.