diff --git a/composer.json b/composer.json
index d7b4502ed..2cf7360bd 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
 	"name": "qtism/qtism",
 	"description": "OAT QTI Software Module Library",
 	"type": "library",
-	"version": "0.9.32",
+	"version": "0.9.33",
 	"authors": [
 		{
 			"name": "Open Assessment Technologies S.A.",
diff --git a/qtism/data/rules/ResponseElseIf.php b/qtism/data/rules/ResponseElseIf.php
index bc768d722..eb5308238 100644
--- a/qtism/data/rules/ResponseElseIf.php
+++ b/qtism/data/rules/ResponseElseIf.php
@@ -14,7 +14,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  * 
- * Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
+ * Copyright (c) 2013-2016 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
  * 
  * @author Jérôme Bogaerts, <jerome@taotesting.com>
  * @license GPLv2
@@ -61,7 +61,6 @@ class ResponseElseIf extends QtiComponent {
 	 * 
 	 * @param Expression $expression An expression to be evaluated with the Else If statement.
 	 * @param ResponseRuleCollection $responseRules A collection of ResponseRule objects.
-	 * @throws InvalidArgumentException If $responseRules is an empty collection.
 	 */
 	public function __construct(Expression $expression, ResponseRuleCollection $responseRules) {
 		$this->setExpression($expression);
@@ -101,16 +100,9 @@ public function getResponseRules() {
 	 * to the Else If statement returns true.
 	 * 
 	 * @param ResponseRuleCollection $responseRules A collection of ResponseRule objects.
-	 * @throws InvalidArgumentException If $responseRules is an empty collection.
 	 */
 	public function setResponseRules(ResponseRuleCollection $responseRules) {
-		if (count($responseRules) > 0) {
-			$this->responseRules = $responseRules;
-		}
-		else {
-			$msg = "A ResponseElseIf object must be bound to at lease one ResponseRule object.";
-			throw new InvalidArgumentException($msg);
-		}
+        $this->responseRules = $responseRules;
 	}
 	
 	public function getQtiClassName() {
diff --git a/qtism/data/rules/ResponseIf.php b/qtism/data/rules/ResponseIf.php
index c2518f5e9..c373522ca 100644
--- a/qtism/data/rules/ResponseIf.php
+++ b/qtism/data/rules/ResponseIf.php
@@ -14,7 +14,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  * 
- * Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
+ * Copyright (c) 2013-2016 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
  * 
  * @author Jérôme Bogaerts, <jerome@taotesting.com>
  * @license GPLv2
@@ -25,7 +25,6 @@
 namespace qtism\data\rules;
 
 use qtism\data\QtiComponentCollection;
-
 use qtism\data\QtiComponent;
 use qtism\data\expressions\Expression;
 use \InvalidArgumentException;
@@ -67,7 +66,6 @@ class ResponseIf extends QtiComponent {
 	 * 
 	 * @param Expression $expression The expression to be evaluated with the If statement.
 	 * @param ResponseRuleCollection $responseRules A collection of sub expressions to be evaluated if the Expression returns true.
-	 * @throws InvalidArgumentException If $responseRules does not contain any ResponseRule object.
 	 */
 	public function __construct(Expression $expression, ResponseRuleCollection $responseRules) {
 		$this->setExpression($expression);
@@ -97,16 +95,9 @@ public function setExpression(Expression $expression) {
 	 * evaluated with the If statement returns true.
 	 * 
 	 * @param ResponseRuleCollection $responseRules A collection of ResponseRule objects.
-	 * @throws InvalidArgumentException If $responseRules is an empty collection.
 	 */
 	public function setResponseRules(ResponseRuleCollection $responseRules) {
-		if (count($responseRules) > 0) {
-			$this->responseRules = $responseRules;
-		}
-		else {
-			$msg = "A ResponseIf object must be bound to at least one ResponseRule.";
-			throw new InvalidArgumentException($msg);
-		}
+        $this->responseRules = $responseRules;
 	}
 	
 	/**
@@ -124,8 +115,10 @@ public function getQtiClassName() {
 	}
 	
 	public function getComponents() {
-		$comp = array_merge(array($this->getExpression()), 
-							$this->getResponseRules()->getArrayCopy());
+		$comp = array_merge(
+            array($this->getExpression()), 
+            $this->getResponseRules()->getArrayCopy()
+        );
 		
 		return new QtiComponentCollection($comp);
 	}
diff --git a/test/qtism/runtime/processing/ResponseProcessingEngineTest.php b/test/qtism/runtime/processing/ResponseProcessingEngineTest.php
index 038fb26f8..a787453f9 100644
--- a/test/qtism/runtime/processing/ResponseProcessingEngineTest.php
+++ b/test/qtism/runtime/processing/ResponseProcessingEngineTest.php
@@ -44,6 +44,61 @@ public function testResponseProcessingMatchCorrect() {
 		$this->assertInstanceOf('qtism\\common\\datatypes\\Float', $context['SCORE']);
 		$this->assertEquals(1.0, $context['SCORE']->getValue());
 	}
+    
+    public function testResponseProcessingNoResponseRule() {
+		$responseProcessing = $this->createComponentFromXml('
+			<responseProcessing>
+                <responseCondition>
+                    <responseIf>
+                        <match>
+                            <variable identifier="RESPONSE"/>
+                            <baseValue baseType="identifier">ChoiceA</baseValue>
+                        </match>
+                        <!-- Do nothing... -->
+                    </responseIf>
+                    <responseElseIf>
+                        <match>
+                            <variable identifier="RESPONSE"/>
+                            <baseValue baseType="identifier">ChoiceB</baseValue>
+                        </match>
+                        <!-- Do nothing... -->
+                    </responseElseIf>
+                    <responseElse>
+                        <setOutcomeValue identifier="SCORE">
+                            <baseValue baseType="float">1.0</baseValue>
+                        </setOutcomeValue>
+                    </responseElse>
+                </responseCondition>
+            </responseProcessing>
+		');
+		
+		$responseDeclaration = $this->createComponentFromXml('
+			<responseDeclaration identifier="RESPONSE" cardinality="single" baseType="identifier"/>	
+		');
+		
+		$outcomeDeclaration = $this->createComponentFromXml('
+			<outcomeDeclaration identifier="SCORE" cardinality="single" baseType="float"/>
+		');
+		
+		$respVar = ResponseVariable::createFromDataModel($responseDeclaration);
+		$outVar = OutcomeVariable::createFromDataModel($outcomeDeclaration);
+		$context = new State(array($respVar, $outVar));
+		
+		$engine = new ResponseProcessingEngine($responseProcessing, $context);
+		
+		$context['RESPONSE'] = new Identifier('ChoiceA');
+		$engine->process();
+		$this->assertNull($context['SCORE']);
+        
+        $context['RESPONSE'] = new Identifier('ChoiceB');
+		$engine->process();
+		$this->assertNull($context['SCORE']);
+        
+        $context['RESPONSE'] = new Identifier('ChoiceC');
+        $engine->process();
+        $this->assertInstanceOf('qtism\\common\\datatypes\\Float', $context['SCORE']);
+		$this->assertEquals(1.0, $context['SCORE']->getValue());
+	}
 	
 	public function testResponseProcessingExitResponse() {
 	    $responseProcessing = $this->createComponentFromXml('
@@ -64,4 +119,4 @@ public function testResponseProcessingExitResponse() {
 	        $this->assertEquals(RuleProcessingException::EXIT_RESPONSE, $e->getCode());
 	    }
 	}
-}
\ No newline at end of file
+}