diff --git a/Controller/ExportController.php b/Controller/ExportController.php
index 26ae3d187..4c777db08 100644
--- a/Controller/ExportController.php
+++ b/Controller/ExportController.php
@@ -222,7 +222,7 @@ class ExportController extends Controller
                     'csrf_protection' => $isGenerate ? false : true,              
               ));
         
-        if ($step === 'centers') {
+        if ($step === 'centers' or $step === 'generate_centers') {
             $builder->add('centers', PickCenterType::class, array(
                'export_alias' => $alias 
             ));
@@ -393,7 +393,11 @@ class ExportController extends Controller
     {
         $exportManager = $this->get('chill.main.export_manager');
         
-        $formExport = $this->createCreateFormExport($alias, 'generate_export');
+        $formCenters = $this->createCreateFormExport($alias, 'generate_centers');
+        $formCenters->handleRequest($request);
+        $dataCenters = $formCenters->getData();
+        
+        $formExport = $this->createCreateFormExport($alias, 'generate_export', $dataCenters);
         $formExport->handleRequest($request);
         $dataExport = $formExport->getData();
         
@@ -402,6 +406,7 @@ class ExportController extends Controller
         $formFormatter->handleRequest($request);
         $dataFormatter = $formFormatter->getData();
         
-        return $exportManager->generate($alias, $dataExport['export'], $dataFormatter['formatter']);
+        return $exportManager->generate($alias, $dataCenters['centers'],
+                $dataExport['export'], $dataFormatter['formatter']);
     }
 }
diff --git a/Export/ExportInterface.php b/Export/ExportInterface.php
index 14cb21424..fd0126c8b 100644
--- a/Export/ExportInterface.php
+++ b/Export/ExportInterface.php
@@ -39,9 +39,10 @@ interface ExportInterface extends ExportElementInterface
      * 
      * @param QueryBuilder $qb
      * @param array $requiredModifiers
+     * @param array $acl an array where each row as a `center` key containing the Chill\MainBundle\Entity\Center, and `circles` containing the reachable circles
      * TODO : we should add ability to receive data from a form
      */
-    public function initiateQuery(QueryBuilder $qb, array $requiredModifiers);
+    public function initiateQuery(QueryBuilder $qb, array $requiredModifiers, $acl);
     
     public function buildForm(FormBuilderInterface $builder);
     
diff --git a/Export/ExportManager.php b/Export/ExportManager.php
index fc7409977..0ef3e1272 100644
--- a/Export/ExportManager.php
+++ b/Export/ExportManager.php
@@ -30,6 +30,7 @@ use Doctrine\ORM\QueryBuilder;
 use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
 use Symfony\Component\Security\Core\Authorization\AuthorizationChecker;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
+use Chill\MainBundle\Form\Type\Export\PickCenterType;
 
 /**
  * Collects all agregators, filters and export from
@@ -338,12 +339,14 @@ class ExportManager
      * @param mixed[] $data
      * @return Response
      */
-    public function generate($exportAlias, array $data, array $formatterData)
+    public function generate($exportAlias, array $pickedCentersData, array $data, array $formatterData)
     {
         $export = $this->getExport($exportAlias);
         $qb = $this->em->createQueryBuilder();
+        $centers = $this->getPickedCenters($pickedCentersData);
         
-        $qb = $export->initiateQuery($qb, $this->retrieveUsedModifiers($data));
+        $qb = $export->initiateQuery($qb, $this->retrieveUsedModifiers($data), 
+                $this->buildCenterReachableScopes($centers, $export));
         
         //handle filters
         $this->handleFilters($export, $qb, $data['filters']);
@@ -371,6 +374,26 @@ class ExportManager
                 $filters, $aggregatorsData);
     }
     
+    /**
+     * build the array required for defining centers and circles in the initiate 
+     * queries of ExportElementsInterfaces
+     * 
+     * @param \Chill\MainBundle\Entity\Center[] $centers
+     */
+    private function buildCenterReachableScopes(array $centers, ExportElementInterface $element) {
+        $r = array();
+        
+        foreach($centers as $center) {
+            $r[] = array(
+                'center' => $center,
+                'circles' => $this->authorizationHelper->getReachableScopes($this->user, 
+                        $element->requiredRole(), $center)
+            );
+        }
+        
+        return $r;
+    }
+    
     /**
      * get the aggregators typse used in the form export data
      * 
@@ -397,7 +420,7 @@ class ExportManager
     
     public function getPickedCenters(array $data)
     {
-        return $data['c'];
+        return $data[PickCenterType::CENTERS_IDENTIFIERS];
     }
     
     /**
diff --git a/Form/Type/Export/PickCenterType.php b/Form/Type/Export/PickCenterType.php
index 102290ada..4f375bc5b 100644
--- a/Form/Type/Export/PickCenterType.php
+++ b/Form/Type/Export/PickCenterType.php
@@ -49,6 +49,8 @@ class PickCenterType extends AbstractType
      */
     protected $exportManager;
     
+    const CENTERS_IDENTIFIERS = 'c';
+    
     /**
      *
      * @var AuthorizationHelper
@@ -76,7 +78,7 @@ class PickCenterType extends AbstractType
         $centers = $this->authorizationHelper->getReachableCenters($this->user, 
               $export->requiredRole());
         
-        $builder->add('c', EntityType::class, array(
+        $builder->add(self::CENTERS_IDENTIFIERS, EntityType::class, array(
            'class' => 'ChillMainBundle:Center',
            'query_builder' => function(EntityRepository $er) use ($centers) {
                 $qb = $er->createQueryBuilder('c');