To be allowed to log this cache you must have logged at least 10 different cache types during the same day. Furthermore you must have done this three times (not necessarily on the same day) and in different countries each time. I.e. you need to have logged 30 caches to fulfill this requirement. However, lab caches do not count since you can not prove which day they were logged.
You should specify in your log on which dates you logged at least 10 different cache types during the same day in three different countries. You should also state the cache names, GC code and type for each and everyone of the caches.
If someone can create a challenge checker for this challenge cache it would be much appreciated. Thanks!