><td>No</td></tr><tr id=Source-not_request_principals><td><code>notRequestPrincipals</code></td><td><code>string[]</code></td><td><p>Optional. A list of negative match of request identities.</p></td><td>No</td></tr><tr id=Source-namespaces><td><code>namespaces</code></td><td><code>string[]</code></td><td><p>Optional. A list of namespaces, which matches to the &ldquo;source.namespace&rdquo;
attribute. This field requires mTLS enabled.</p><p>If not set, any namespace is allowed.</p></td><td>No</td></tr><tr id