Add link to previous section
@@ -308,6 +308,8 @@ creating a new event in this room should populate the new event's
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E4
+.. _`auth events selection`:
+
The ``auth_events`` field of a PDU identifies the set of events which give the
sender permission to send the event. The ``auth_events`` for the
``m.room.create`` event in a room is empty; for other events, it should be the
@@ -384,7 +386,7 @@ The rules are as follows:
a. have duplicate entries for a given ``type`` and ``state_key`` pair
#. have entries whose ``type`` and ``state_key`` don't match those
- specified by the algorithm described previously.
+ specified by the `auth events selection`_ algorithm described above.
#. If event does not have a ``m.room.create`` in its ``auth_events``, reject.
