Songs must not be released before 1st of September. But what time zone?

Imagine: Finland and Sweden both do internal selection and want to release as soon as possible.

So if the Finish entry was aired in Finish Radio at Sep, 1st 0:01 Helsinki time, it would be still Aug 31st, 23:01 in Stockholm.

Is the Finish entry now disqualified?

If not: the song gets recorded and aired at 23:11 Stockholm time by a Swedish radio station.

Is now the Finish entry disqualified?

If not: If the Swedish entry was played im the same night at 23:15 on the same Station, then the Swedish entry must be disqualified although it’s played after the Finish.

And what if the Swedish entry sets up a Stage right at the Finish – Swedish border? The stage and Eversthing im Finnland, but the audience in Sweden? Are they allowed to Play their Song at Sep 1st 0:01 without getting disqualified?