This excerpt taken from the SYT 20-F filed Mar 1, 2006.
Listing Standards of the New York Stock Exchange (NYSE)
Syngenta meets the vast majority of NYSEs Corporate Governance Standards. The few exceptions are mainly due to the different legal system in Switzerland. In accordance with NYSEs listing standards, such differences are explained in detail on Syngentas website at www.syngenta.com/en/investor/corpgov_nyse.aspx.