SiteController::accessRules PHP Method

    public function accessRules()
    {
        return array(array('deny', 'users' => array('*'), 'expression' => 'Yii::app()->user->isGuest==true', 'actions' => array('emailchange')));
    }

 private function reconfigureAccessRules()
 {
     self::$accessRules = CMap::mergeArray(array(array()), parent::$accessRules);
 }