On Wednesday, July 6, 2011, the Swiss government adopted standards on banking secrecy laid out by the Organization for Economic Cooperation and Development, or OECD, which will allow foreign authorities to pursue citizens suspected of using hidden Swiss accounts for tax evasion. According to these standards, international administrative assistance should be possible not only in the case of tax fraud but also in the case of tax evasion and for tax assessment.
You can read about the standards in this article.