Bt11 is the one of the few - or possibly the first - GMOs in which DG Environment proposed to the member states to reject the an application for the cultivation of an GMO. As of October 2009, the application is still pending. Meanwhile in September 2009, Syngenta applied for a combined renewal for several separate authorisations for Bt11 food and feed products, including for Bt11 as food, which was only granted in [] and which is still valid until 2014 anyway.
Just before the GMO adopted its assessment of Bt11 for cultivation and as feed, contamination of Bt11 with Bt10 was discovered in March 2005.
Several member states critized the the positive opinion of the GMO Panel, and DG Environment proposed to reject the application. However, this opinion was not shared by the EU Commission as a whole. Instead the application was handed back to the EFSA for additional assessment after the GMO Panel had already given a positive opinion in 2005. A list of additional scientific material was passed to the EFSA. According to experts in DG Environment this new scientific evidence contained reason not to authorize the cultivation of the two GM maize events Bt11 and 1507 but the EFSA GMO Panel again came to a positive opinion.