diff --git a/src/main/java/org/opengis/cite/wfs30/collections/GetFeaturesOperation.java b/src/main/java/org/opengis/cite/wfs30/collections/GetFeaturesOperation.java
index da96bd31..7a994d99 100644
--- a/src/main/java/org/opengis/cite/wfs30/collections/GetFeaturesOperation.java
+++ b/src/main/java/org/opengis/cite/wfs30/collections/GetFeaturesOperation.java
@@ -298,7 +298,7 @@ public void validateGetFeaturesOperationResponse_property_numberMatched( Map<Str
      *
      * Verify that the OpenAPI document correctly describes the limit parameter for the Get Features operation.
      *
-     * d) References: Requirements 18 and 19
+     * d) References: Requirement 18
      *
      * Expected parameter:
      * 
@@ -309,13 +309,13 @@ public void validateGetFeaturesOperationResponse_property_numberMatched( Map<Str
      * schema:
      *   type: integer
      *   minimum: 1
-     *   maximum: 10000
-     *   default: 10
+     *   maximum: 10000 (example)
+     *   default: 10 (example)
      * style: form
      * explode: false
      * </pre>
      */
-    @Test(description = "Implements A.4.4.11. Limit Parameter (Requirement 18, 19)", dependsOnMethods = "validateGetFeaturesOperation")
+    @Test(description = "Implements A.4.4.11. Limit Parameter (Requirement 18)", dependsOnMethods = "validateGetFeaturesOperation")
     public void validateLimitParameter() {
         Parameter limit = apiModel.getParameter( "limit" );
         assertNotNull( limit, "Required limit parameter in OpenAPI document is missing" );
@@ -335,6 +335,59 @@ public void validateLimitParameter() {
         assertIntegerGreaterZero( schema.getDefault(), "schema -> default" );
     }
 
+    /**
+     * .4.4.12. Bounding Box Parameter (Test method 1)
+     *
+     * a) Test Purpose:Validate the proper handling of the bbox parameter.
+     *
+     * b) Pre-conditions: Tests A.4.4.9 and A.4.4.10 have completed successfully.
+     *
+     * c) Test Method:
+     *
+     * Verify that the OpenAPI document correctly describes the bbox parameter for the Get Features operation.
+     *
+     * d) References: Requirement 20
+     *
+     * Expected parameter:
+     *
+     * <pre>
+     * name: bbox
+     * in: query
+     * required: false
+     * schema:
+     *   type: array
+     *   minItems: 4
+     *   maxItems: 6
+     *   items:
+     *     type: number
+     * style: form
+     * explode: false
+     * </pre>
+     */
+    @Test(description = "Implements A.4.4.12. Bounding Box (Requirement 20)", dependsOnMethods = "validateGetFeaturesOperation")
+    public void validateBboxParameter() {
+        Parameter limit = apiModel.getParameter( "bbox" );
+        assertNotNull( limit, "Required bbox parameter in OpenAPI document is missing" );
+
+        String msg = "Expected property '%s' with value '%s' but was '%s'";
+
+        assertEquals( limit.getName(), "bbox", String.format( msg, "name", "limit", limit.getName() ) );
+        assertEquals( limit.getIn(), "query", String.format( msg, "in", "query", limit.getIn() ) );
+        assertFalse( limit.getRequired(), String.format( msg, "required", "false", limit.getRequired() ) );
+        assertEquals( limit.getStyle(), "form", String.format( msg, "style", "form", limit.getStyle() ) );
+        assertFalse( limit.getExplode(), String.format( msg, "explode", "false", limit.getExplode() ) );
+
+        Schema schema = limit.getSchema();
+        assertEquals( schema.getType(), "array", String.format( msg, "schema -> type", "array", schema.getType() ) );
+        assertEquals( schema.getMinItems().intValue(), 4,
+                      String.format( msg, "schema -> minItems", "4", schema.getMinItems() ) );
+        assertEquals( schema.getMaxItems().intValue(), 6,
+                      String.format( msg, "schema -> maxItems", "6", schema.getMaxItems() ) );
+
+        String itemsType = schema.getItemsSchema().getType();
+        assertEquals( itemsType, "number", String.format( msg, "schema -> items -> type", "number", itemsType ) );
+    }
+
     private String findGetFeatureUrlForGeoJson( Map<String, Object> collection ) {
         List<Object> links = (List<Object>) collection.get( "links" );
         for ( Object linkObject : links ) {
diff --git a/src/test/java/org/opengis/cite/wfs30/collections/GetFeaturesOperationIT.java b/src/test/java/org/opengis/cite/wfs30/collections/GetFeaturesOperationIT.java
index 436d82af..65c14904 100644
--- a/src/test/java/org/opengis/cite/wfs30/collections/GetFeaturesOperationIT.java
+++ b/src/test/java/org/opengis/cite/wfs30/collections/GetFeaturesOperationIT.java
@@ -63,11 +63,15 @@ public void testGetFeatureOperations()
             Map<String, Object> parameter = (Map<String, Object>) collection[0];
             getFeaturesOperation.validateGetFeaturesOperation( parameter );
             getFeaturesOperation.validateGetFeaturesOperationResponse_Links( parameter );
-            //skipped: getFeaturesOperation.validateGetFeaturesOperationResponse_property_timeStamp( parameter );
-            //getFeaturesOperation.validateGetFeaturesOperationResponse_property_numberReturned( parameter );
-            //getFeaturesOperation.validateGetFeaturesOperationResponse_property_numberMatched( parameter );
+            // skipped (parameter missing):
+            // getFeaturesOperation.validateGetFeaturesOperationResponse_property_timeStamp( parameter );
+            // skipped (parameter missing):
+            // getFeaturesOperation.validateGetFeaturesOperationResponse_property_numberReturned( parameter );
+            // skipped (parameter missing):
+            // getFeaturesOperation.validateGetFeaturesOperationResponse_property_numberMatched( parameter );
         }
         getFeaturesOperation.validateLimitParameter();
+        // fails (schema->items->type missing): getFeaturesOperation.validateBboxParameter();
     }
 
 }