What does the MIF element "CAndCondition" mean?

In MIF, here's the definition of a condition that FrameMaker applies when you add text with Track Text Edits turned on:

<Condition

  <CTag `FM8_TRACK_CHANGES_ADDED'>

  <CState CHidden>

  <CStyle CUnderline>

  <CSeparation 10>

  <CColor `Forest Green'>

  <CAndCondition >

>

Does anyone know what <CAndCondition > means? It's not explained in the MIF Reference.