This is the "Allgemeinzuteilung" of the "Bundesnetzagentur" in Germany, so the official grant to use those frequencies unlicensed from the authority that is controlling frequency usage in Germany.
There's no limitation on the channel bandwidth, only a limitation on the max. EIRP expressed in mW/MHz. So doubling your channel bandwidth does not allow you to double your EIRP (obviously)
I _believe_ (would have to look up again) that there is a quirk with the European "harmonized norm" which is cited as binding autority for measurement methods etc. when there is a RF interference where the Bundesnetzagentur will do measurements (i.e. military complaining about noise in the upper 5 GHz band or the like).
I believe in the EU harmonized document there is still a channel bandwidth limitation of 20 MHz. There are efforts to change the EU norm according to the German interpretation, but this was stopped by two EU countries last year (don't remember who it was - I think Portugal was amongst them).
So effectively you are allowed to use turbo mode in Germany, but there could be conflicts when you are forced to do measurements according to the harmonized EU norm.
Was that clear enough to understand? (Also note, I'm no lawyer - but had several discussions about this topic with guys from the German Bundesnetzagentur).