Arch may share your personal data with third parties under any of the following circumstances: </p> <ul> <li>Your publicly available personal data in the Arch account system, as described above, is accessible by anyone unless you, as the account holder, opt out as already described in this Privacy Policy.</li> <li>As required by law (such as responding to a valid subpoena, warrant, audit, or agency action, or to prevent fraud).</li> <li>For research activities, including the production of statistical reports (such aggregated information is used to describe our services and is not used to contact the subjects of the report).</li> </ul>