>(<span class='st'>"year"</span>, <span class='st'>"fortnight"</span>))</pre>

    <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
    <table class="ref-arguments">
    <colgroup><col class="name" /><col class="desc" /></colgroup>
    <tr>
      <th>fortnightly_income</th>
      <td><p>'Ordinary income' received fortnightly within the 
meaning of s. 1068-G1 of the <em>Social Security Act 1991</em>.</p></td>
    </tr>
    <tr>
      <th>annual_income</th>
      <td