Incorporated @richvdh suggestions

specification/rooms/v1.rst

@@ -245,14 +245,23 @@ The rules are as follows:
 
    #. For the keys ``users_default``, ``events_default``,
       ``state_default``, ``ban``, ``redact``, ``kick``, ``invite`` check if they were changed. 
-      For each of the changed keys, as well as
-      each entry being added, changed or removed under the ``events`` or ``users`` keys:
+      For each of the changed keys:
 
-      i. If the current value is present and higher than the ``sender``'s current power level,
+      i. If the current value is higher than the ``sender``'s current power level,
          reject.
 
-      #. If the new value is present and higher than the ``sender``'s current power level,
+      #. If the new value is higher than the ``sender``'s current power level,
          reject.
+         
+   #. For each entry being added, changed or removed in both the ``events`` and ``users`` keys:
+      
+      i. If the current value is higher than the ``sender``'s current power level,
+         reject.
+         
+      #. If the new value is higher than the ``sender``'s current power level,
+         reject.
+         
+      #. (Note: current/new value can also denote the inferred value from either ``users_default``, ``events_default`` or  ``state_default``)
 
    #. For each entry being changed under the ``users`` key, other than the
       ``sender``'s own entry: