In any event, the wide range of systems should also be taken into consideration; this does not facilitate the formal introduction of a European standard in comparable cases. Even if we assume that non-supervised postal voting is not permitted in all other countries which have not been analysed, it may not be concluded, given the 19 countries where non-supervised postal voting is allowed in some form or another, that there is no such standard, which would mean that this method of voting was incompatible with Protocol 1 to the ECHR.