public function setPoliciesAccepted(string $policies_accepted = "F") : CNabuDataObject
    {
        if ($policies_accepted === null) {
            throw new ENabuCoreException(
                    ENabuCoreException::ERROR_NULL_VALUE_NOT_ALLOWED_IN,
                    array("\$policies_accepted")
            );
        }
        $this->setValue('nb_user_policies_accepted', $policies_accepted);
        
        return $this;
    }