Today, the Secretariat of the Commission for Environmental Cooperation issued a determination requesting a response from Mexico to submission SEM-09-001 (Transgenic Maize in Chihuahua), originally filed with the Secretariat on 28 January 2009, by Greenpeace México, Centro de Derechos Humanos de las Mujeres, Frente Democrático Campesino and El Barzón.