To not create the situation that the final is not played properly.

All teams need to fulfill the requirement - it is not possible to just play summer invite and got to EUCF

Yes - Teams need to participate in their National Championships to be eligible to play at the EUCS. If the tournament is outside the timewindow 15th February and 19th August the result cannot be counted towards the Ranking

For those three teams it might matter to get these additional games. EUF- Approval could be good for them