diff --git a/spec/index.html b/spec/index.html
index 8adbc11..07ee426 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -586,9 +586,11 @@ <h3>IRIs</h3>
     <p class="note">For convenience, a complete [[ABNF]] grammar
       from [[RFC3987]] is provided in <a href="#iri-abnf" class="sectionRef"></a>.</p>
 
-    <p>IRIs in the RDF abstract syntax MUST be <a data-cite="RFC3986#section-5">resolved</a>
-      per [[RFC3986]], and MAY contain a fragment identifier. IRIs SHOULD
-      follow rules defined by the <a data-cite="RFC3986#section-3.1">IRI scheme</a>.
+    <p>IRIs in the RDF abstract syntax 
+      MUST be <a data-cite="RFC3986#section-5">resolved</a> per [[RFC3986]] and
+      MUST NOT be a <a data-cite="RFC3986#section-4.2">relative references</a>.
+      They MAY contain a <a data-cite="RFC3986#section-3.5">fragment identifier</a>.
+      IRIs SHOULD follow rules defined by the <a data-cite="RFC3986#section-3.1">IRI scheme</a>.
     </p>
 
     <p><dfn>IRI equality</dfn>: