<informaltable frame="none">
<tgroup cols="3" colsep="0" rowsep="0">
<colspec colwidth="3*" align="left"/>
<colspec colwidth="1*" align="center"/>
<colspec colwidth="3*" align="right"/>
<tbody>
<row>
<entry><emphasis>&headleft;</emphasis></entry>
<entry>&headcentre;</entry>
<entry><emphasis>&headright;</emphasis></entry>
</row>
</tbody>
</tgroup>
</informaltable>
