CTaskItem::checkAccess

public function checkAccess($action, $params = null): bool
{
	$taskModel = BitrixTasksAccessModelTaskModel::createFromId((int) $this->getId());

	try
	{
		$res = self::getAccessController((int) $this->executiveUserId)->check($action, $taskModel, $params);
	}
	catch (BitrixMainAccessExceptionAccessException $e)
	{
		$res = false;
	}

	return $res;
}