--- a/spec/latest/json-ld/index.html	Tue Jul 23 21:26:50 2013 +0200
+++ b/spec/latest/json-ld/index.html	Tue Jul 23 21:41:14 2013 +0200
@@ -1505,7 +1505,9 @@
     subtree is added to all <tref>array</tref> items. All extra information located outside
     of the <code>@context</code> subtree in the referenced document MUST be
     discarded. Effectively this means that the <tref>active context</tref> is
-    initialized with the referenced external <tref>context</tref>.</p>
+    initialized with the referenced external <tref>context</tref>. A response MUST NOT
+    contain more than one HTTP Link Header [[!RFC5988]] using the
+    <code>http://www.w3.org/ns/json-ld#context</code> link relation.</p>
 
   <p>The following example demonstrates the use of an external context with an
     ordinary JSON document:</p>