diff --git a/lib/metanorma/cc/basicdoc.rng b/lib/metanorma/cc/basicdoc.rng
index e5c02c3e..0469babc 100644
--- a/lib/metanorma/cc/basicdoc.rng
+++ b/lib/metanorma/cc/basicdoc.rng
@@ -95,8 +95,89 @@
       <ref name="pagebreak"/>
       <ref name="hr"/>
       <ref name="bookmark"/>
+      <ref name="amend"/>
     </choice>
   </define>
+  <define name="amend">
+    <element name="amend">
+      <ref name="AmendType"/>
+    </element>
+  </define>
+  <define name="AmendType">
+    <optional>
+      <attribute name="id">
+        <data type="ID"/>
+      </attribute>
+    </optional>
+    <attribute name="change">
+      <choice>
+        <value>add</value>
+        <value>modify</value>
+        <value>delete</value>
+        <value>replace</value>
+      </choice>
+    </attribute>
+    <optional>
+      <attribute name="path"/>
+    </optional>
+    <optional>
+      <attribute name="path_end"/>
+    </optional>
+    <optional>
+      <attribute name="title"/>
+    </optional>
+    <optional>
+      <element name="location">
+        <zeroOrMore>
+          <choice>
+            <ref name="locality"/>
+            <ref name="localityStack"/>
+          </choice>
+        </zeroOrMore>
+      </element>
+    </optional>
+    <optional>
+      <element name="description">
+        <zeroOrMore>
+          <ref name="BasicBlock"/>
+        </zeroOrMore>
+      </element>
+    </optional>
+    <optional>
+      <element name="newcontent">
+        <optional>
+          <attribute name="id">
+            <data type="ID"/>
+          </attribute>
+        </optional>
+        <zeroOrMore>
+          <ref name="BasicBlock"/>
+        </zeroOrMore>
+      </element>
+    </optional>
+    <zeroOrMore>
+      <ref name="classification"/>
+    </zeroOrMore>
+    <zeroOrMore>
+      <ref name="contributor"/>
+    </zeroOrMore>
+  </define>
+  <define name="classification">
+    <element name="classification">
+      <ref name="classification_tag"/>
+      <ref name="classification_value"/>
+    </element>
+  </define>
+  <define name="classification_tag">
+    <element name="tag">
+      <text/>
+    </element>
+  </define>
+  <define name="classification_value">
+    <element name="value">
+      <text/>
+    </element>
+  </define>
   <define name="paragraph">
     <element name="p">
       <ref name="ParagraphType"/>
@@ -939,18 +1020,12 @@
     </optional>
     <optional>
       <attribute name="width">
-        <choice>
-          <data type="int"/>
-          <value>auto</value>
-        </choice>
+        <ref name="ImageSize"/>
       </attribute>
     </optional>
     <optional>
       <attribute name="height">
-        <choice>
-          <data type="int"/>
-          <value>auto</value>
-        </choice>
+        <ref name="ImageSize"/>
       </attribute>
     </optional>
     <optional>
@@ -965,6 +1040,14 @@
       </attribute>
     </optional>
   </define>
+  <define name="ImageSize">
+    <choice>
+      <data type="string">
+        <param name="pattern">\d+([.]\d+)?(%?)</param>
+      </data>
+      <value>auto</value>
+    </choice>
+  </define>
   <define name="video">
     <element name="video">
       <attribute name="id">
diff --git a/lib/metanorma/cc/biblio-standoc.rng b/lib/metanorma/cc/biblio-standoc.rng
index f2cc1540..23738651 100644
--- a/lib/metanorma/cc/biblio-standoc.rng
+++ b/lib/metanorma/cc/biblio-standoc.rng
@@ -9,11 +9,42 @@
   -->
   <include href="biblio.rng">
     <define name="BibData">
-      <ref name="BibliographicItem"/>
+      <ref name="StandardBibliographicItem"/>
       <optional>
         <ref name="ext"/>
       </optional>
     </define>
+    <define name="docrelation">
+      <element name="relation">
+        <attribute name="type">
+          <ref name="DocRelationType"/>
+        </attribute>
+        <optional>
+          <element name="description">
+            <ref name="FormattedString"/>
+          </element>
+        </optional>
+        <element name="bibitem">
+          <ref name="StandardReducedBibliographicItem"/>
+        </element>
+        <choice>
+          <zeroOrMore>
+            <ref name="locality"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="localityStack"/>
+          </zeroOrMore>
+        </choice>
+        <choice>
+          <zeroOrMore>
+            <ref name="sourceLocality"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="sourceLocalityStack"/>
+          </zeroOrMore>
+        </choice>
+      </element>
+    </define>
   </include>
   <define name="ext">
     <element name="ext">
@@ -161,4 +192,16 @@
       </optional>
     </element>
   </define>
+  <define name="StandardBibliographicItem">
+    <ref name="BibliographicItem"/>
+    <zeroOrMore>
+      <ref name="amend"/>
+    </zeroOrMore>
+  </define>
+  <define name="StandardReducedBibliographicItem">
+    <ref name="ReducedBibliographicItem"/>
+    <zeroOrMore>
+      <ref name="amend"/>
+    </zeroOrMore>
+  </define>
 </grammar>
diff --git a/lib/metanorma/cc/biblio.rng b/lib/metanorma/cc/biblio.rng
index 357f879a..f18d67ce 100644
--- a/lib/metanorma/cc/biblio.rng
+++ b/lib/metanorma/cc/biblio.rng
@@ -241,6 +241,9 @@
     </element>
   </define>
   <define name="FullNameType">
+    <optional>
+      <ref name="name_abbreviation"/>
+    </optional>
     <choice>
       <group>
         <zeroOrMore>
@@ -266,6 +269,11 @@
       <ref name="variantname"/>
     </zeroOrMore>
   </define>
+  <define name="name_abbreviation">
+    <element name="abbreviation">
+      <ref name="LocalizedString"/>
+    </element>
+  </define>
   <define name="prefix">
     <element name="prefix">
       <ref name="LocalizedString"/>
@@ -870,6 +878,9 @@
     <optional>
       <ref name="validity"/>
     </optional>
+    <optional>
+      <ref name="depiction"/>
+    </optional>
   </define>
   <define name="btitle">
     <element name="title">
diff --git a/lib/metanorma/cc/isodoc.rng b/lib/metanorma/cc/isodoc.rng
index 1454f8b1..e326226b 100644
--- a/lib/metanorma/cc/isodoc.rng
+++ b/lib/metanorma/cc/isodoc.rng
@@ -17,10 +17,19 @@
   these elements; we just want one namespace for any child grammars
   of this.
 -->
-<!-- VERSION v1.2.9 -->
+<!-- VERSION v1.2.12 -->
 <grammar xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns="http://relaxng.org/ns/structure/1.0" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
   <include href="reqt.rng"/>
   <include href="basicdoc.rng">
+    <define name="amend">
+      <element name="amend">
+        <ref name="BlockAttributes"/>
+        <ref name="AmendType"/>
+        <zeroOrMore>
+          <ref name="autonumber"/>
+        </zeroOrMore>
+      </element>
+    </define>
     <define name="admonition">
       <element name="admonition">
         <attribute name="type">
@@ -2319,69 +2328,6 @@
       <ref name="CitationType"/>
     </element>
   </define>
-  <define name="amend">
-    <element name="amend">
-      <optional>
-        <attribute name="id">
-          <data type="ID"/>
-        </attribute>
-      </optional>
-      <attribute name="change">
-        <choice>
-          <value>add</value>
-          <value>modify</value>
-          <value>delete</value>
-          <value>replace</value>
-        </choice>
-      </attribute>
-      <optional>
-        <attribute name="path"/>
-      </optional>
-      <optional>
-        <attribute name="path_end"/>
-      </optional>
-      <optional>
-        <attribute name="title"/>
-      </optional>
-      <ref name="BlockAttributes"/>
-      <optional>
-        <element name="location">
-          <zeroOrMore>
-            <ref name="locality"/>
-          </zeroOrMore>
-        </element>
-      </optional>
-      <zeroOrMore>
-        <ref name="autonumber"/>
-      </zeroOrMore>
-      <optional>
-        <element name="description">
-          <zeroOrMore>
-            <ref name="BasicBlock"/>
-          </zeroOrMore>
-        </element>
-      </optional>
-      <optional>
-        <element name="newcontent">
-          <optional>
-            <attribute name="id">
-              <data type="ID"/>
-            </attribute>
-          </optional>
-          <zeroOrMore>
-            <ref name="BasicBlock"/>
-          </zeroOrMore>
-        </element>
-      </optional>
-      <optional>
-        <element name="description">
-          <zeroOrMore>
-            <ref name="BasicBlock"/>
-          </zeroOrMore>
-        </element>
-      </optional>
-    </element>
-  </define>
   <define name="autonumber">
     <element name="autonumber">
       <attribute name="type">
diff --git a/lib/metanorma/cc/reqt.rng b/lib/metanorma/cc/reqt.rng
index 854067c6..3f835c88 100644
--- a/lib/metanorma/cc/reqt.rng
+++ b/lib/metanorma/cc/reqt.rng
@@ -207,20 +207,4 @@
       <value>permission</value>
     </choice>
   </define>
-  <define name="classification">
-    <element name="classification">
-      <ref name="classification_tag"/>
-      <ref name="classification_value"/>
-    </element>
-  </define>
-  <define name="classification_tag">
-    <element name="tag">
-      <text/>
-    </element>
-  </define>
-  <define name="classification_value">
-    <element name="value">
-      <text/>
-    </element>
-  </define>
 </grammar>
diff --git a/lib/metanorma/cc/version.rb b/lib/metanorma/cc/version.rb
index a174aef3..ee196906 100644
--- a/lib/metanorma/cc/version.rb
+++ b/lib/metanorma/cc/version.rb
@@ -1,5 +1,5 @@
 module Metanorma
   module CC
-    VERSION = "2.3.6".freeze
+    VERSION = "2.4.0".freeze
   end
 end
diff --git a/metanorma-cc.gemspec b/metanorma-cc.gemspec
index 3ba2543e..cc89deeb 100644
--- a/metanorma-cc.gemspec
+++ b/metanorma-cc.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
   spec.required_ruby_version = Gem::Requirement.new(">= 2.7.0")
 
-  spec.add_dependency "metanorma-generic", "~> 2.5.4"
+  spec.add_dependency "metanorma-generic", "~> 2.6.0"
 
   spec.add_development_dependency "debug"
   spec.add_development_dependency "equivalent-xml", "~> 0.6"