diff --git a/module/program/model.php b/module/program/model.php
index 2e01e65f0a..3cc619b9ac 100644
--- a/module/program/model.php
+++ b/module/program/model.php
@@ -755,6 +755,7 @@ class programModel extends model
             $this->loadModel('personnel')->updateWhitelist($whitelist, 'program', $programID);
             if($program->acl != 'open') $this->loadModel('user')->updateUserView($programID, 'program');
 
+	    /* If the program changes, program and project authorities under this program should be refreshed. */
 	    $children = $this->dao->select('id, type')->from(TABLE_PROGRAM)->where('path')->like("%,{$programID},%")->andWhere('id')->ne($programID)->andWhere('acl')->eq('program')->fetchPairs('id', 'type');
             $this->loadModel('user');
             foreach($children as $id => $type) $this->user->updateUserView($id, $type);