translate English to French: The principal obligation is to take steps to achieve progressively the full realization of the right to adequate food.  This imposes an obligation to move as expeditiously as possible towards that goal.
La principale obligation consiste à agir en vue d'assurer progressivement le plein exercice du droit à une nourriture suffisante, ce qui impose l'obligation de progresser aussi rapidement que possible vers cet objectif.