it of the bit mask is set</td>
  <td class="type">INTEGER</td>
  <td class="constraint"></td>
  <td class="min">8</td>
  <td class="max">72</td>
  </tr>
  <tr class="OddRow">
  <td class="no">3</td>
  <td class="field">bA2Present</td>
  <td class="comment"></td>
  <td class="optional">always</td>
  <td class="type">BOOLEAN</td>
  <td class="constraint"></td>
  <td class="min">1</td>
  <td class="max">1</td>
  </tr>
  <tr class="EvenRow">
  <td class="no">4</td>
  <td class="field">a2</td>
  <td class="comme