<note> <p>This is <b>AWS WAF Classic</b> documentation. For more information, see <a href="https://docs.aws.amazon.com/waf/latest/developerguide/classic-waf-chapter.html">AWS WAF Classic</a> in the developer guide.</p> <p> <b>For the latest version of AWS WAF</b>, use the AWS WAFV2 API and see the <a href="https://docs.aws.amazon.com/waf/latest/developerguide/waf-chapter.html">AWS WAF Developer Guide</a>. With the latest version, AWS WAF has a single set of endpoints for regional and global use. </p> </note> <p>Permanently deletes a <a>RegexMatchSet</a>. You can't delete a <code>RegexMatchSet</code> if it's still used in any <code>Rules</code> or if it still includes any <code>RegexMatchTuples</code> objects (any filters).</p> <p>If you just want to remove a <code>RegexMatchSet</code> from a <code>Rule</code>, use <a>UpdateRule</a>.</p> <p>To permanently delete a <code>RegexMatchSet</code>, perform the following steps:</p> <ol> <li> <p>Update the <code>RegexMatchSet</code> to remove filters, if any. For more information, see <a>UpdateRegexMatchSet</a>.</p> </li> <li> <p>Use <a>GetChangeToken</a> to get the change token that you provide in the <code>ChangeToken</code> parameter of a <code>DeleteRegexMatchSet</code> request.</p> </li> <li> <p>Submit a <code>DeleteRegexMatchSet</code> request.</p> </li> </ol>