Reminder::add

public function add(array $data, array $parameters = array())
{
	$result = [];

	if (!TaskAccessController::can($this->userId, ActionDictionary::ACTION_TASK_READ, (int)$data['TASK_ID']))
	{
		$this->addForbiddenError();
		return $result;
	}

	if($taskId = $this->checkTaskId($data['TASK_ID']))
	{
		// todo: introduce a new policy here: who can add a new reminder for a different user OR even for himself?
		$reminder = new \CTaskReminders();
		$field = array(
			"TASK_ID" => 		$taskId,
			"USER_ID" => 		$this->userId,
			"REMIND_DATE" => 	$data["DATE"],
			"TYPE" => 			$data["TYPE"],
			"TRANSPORT" => 		$data["TRANSPORT"]
		);
		if(!$reminder->add($field))
		{
			throw new \Bitrix\Tasks\ActionFailedException('Reminder add', array(
				'AUX' => array(
					'ERROR' => array(
						'TASK_ID' => $taskId,
					),
				)
			));
		}
	}

	return $result;
}