diff --git a/library/Exceptions/SubdivisionCode/CsSubdivisionCodeException.php b/library/Exceptions/SubdivisionCode/CsSubdivisionCodeException.php
new file mode 100644
index 00000000..bc31839f
--- /dev/null
+++ b/library/Exceptions/SubdivisionCode/CsSubdivisionCodeException.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Respect/Validation.
+ *
+ * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
+ *
+ * For the full copyright and license information, please view the "LICENSE.md"
+ * file that was distributed with this source code.
+ */
+
+namespace Respect\Validation\Exceptions\SubdivisionCode;
+
+use Respect\Validation\Exceptions\SubdivisionCodeException;
+
+/**
+ * Exception class for Serbia And Montenegro subdivision code.
+ *
+ * ISO 3166-1 alpha-2: CS
+ */
+class CsSubdivisionCodeException extends SubdivisionCodeException
+{
+    public static $defaultTemplates = array(
+        self::MODE_DEFAULT => array(
+            self::STANDARD => '{{name}} must be a subdivision code of Serbia And Montenegro',
+        ),
+        self::MODE_NEGATIVE => array(
+            self::STANDARD => '{{name}} must not be a subdivision code of Serbia And Montenegro',
+        ),
+    );
+}
diff --git a/library/Rules/SubdivisionCode/CsSubdivisionCode.php b/library/Rules/SubdivisionCode/CsSubdivisionCode.php
new file mode 100644
index 00000000..6df2b327
--- /dev/null
+++ b/library/Rules/SubdivisionCode/CsSubdivisionCode.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Respect/Validation.
+ *
+ * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
+ *
+ * For the full copyright and license information, please view the "LICENSE.md"
+ * file that was distributed with this source code.
+ */
+
+namespace Respect\Validation\Rules\SubdivisionCode;
+
+use Respect\Validation\Rules\AbstractSearcher;
+
+/**
+ * Validator for Serbia And Montenegro subdivision code.
+ *
+ * ISO 3166-1 alpha-2: CS
+ *
+ * @link http://www.geonames.org/CS/administrative-division-serbia-and-montenegro.html
+ */
+class CsSubdivisionCode extends AbstractSearcher
+{
+    public $haystack = array(
+        'KOS', // Kosovo
+        'MON', // Montenegro
+        'SER', // Serbia
+        'VOJ', // Vojvodina
+    );
+
+    public $compareIdentical = true;
+}