According to IP Watch, by the end of last month, the Mexican Senate approved a resolution (in Spanish) rejecting the Anti-Counterfeiting Trade Agreement (in Spanish) due to the "absence of inclusion in the negotiations, potential negative impact on internet users’ access to knowledge, freedom of expression and other concerns". For that reason, senators asked their Government not to sign the agreement. The resolution is not binding, though.Further information on this topic can be found in Michael Geist's blog.
