Translate the following English sentence to French:
"While, however, it must still be possible to make annual adjustments, they must nonetheless comply, for the most part, with the commitments made in Berlin covering this period."
Toutefois, si des ajustements annuels doivent demeurer possibles, il n'en reste pas moins qu'ils doivent respecter, pour l'essentiel, les engagements pris à Berlin qui couvrent la période.