From a CNET article Free-trade pacts export U.S. copyright controls, October 14, 2011

In the U.S., it’s not against the law “for a person to engage in an act of security testing.” That authorization is missing in the free-trade agreements. Also absent are most of the exemptions created by the Copyright Office, including ones relating to bypassing e-book and video game security in some cases, circumventing dongle-based restrictions, and copying clips from DVDs for documentary filmmaking.