te on an element. </p>
         </section>
      </section>
   </section><section class="tests"><h2>Tests</h2>
      <section class="procedure"><h3>Procedure</h3>
         <ol>
            <li> Check that no attribute occurs more than once on any element </li>
         </ol>
      </section>
      <section class="results"><h3>Expected Results</h3>
         <ul>
            <li> Check 1 is true. </li>
         </ul>
      </section>
   </section><section class="resources"><h2>Resources</h2>
      
         <