Changes to This Privacy Policy   <p>We may revise this Privacy Policy from time to time. The most current version of the policy will govern our processing of your personal data and will always be at https://twitter.com/privacy. If we make a change to this policy that, in our sole discretion, is material, we will notify you via an @Twitter update or email to the email address associated with your account. By continuing to access or use the Services after those changes become effective, you agree to be bound by the revised Privacy Policy.</p>

Twitter can change the terms at any time when they see fit. They give notification, in their sole disretion, via an @Twitter update or via email. In September 2009, Twitter considerably changed the terms for the copyright license and only gave a very short notice, only a few hours before the changes applied.