Inside <permit> data concerning a dive permission are given.
The <permit> element stands inside <divepermissions>, it can be repeated any times.
If <divepermissions> is given, at least one <permit> element must occur, too.
(see also <owner>, and <buddy>)
<permit>
    <name>DiveCard</name>
    <region>Austria</region>
    <issuedate>
        <date>
            <year>2004</year
            <month>8</month>
            <day>24</day>
            <dayofweek>6</dayofweek>
        </date>
    </issuedate>
    <validdate>
        <date>
            <year>2005</year
            <month>8</month>
            <day>23</day>
            <dayofweek>2</dayofweek>
        </date>
    </validdate>
</permit>