P.W.B Aj'Rmr - Each time you attack, you may re-roll 1 of you attack dice for every damage card assigned to your ship.
Nullifier Core - Each time you defend, you may re-roll 1 of your defense dice. Discard this card if your ship sustains any damage to its hull.
Do these cards fall under the new once per turn 'may' ruling? Or does the 'Each time' allow me to re-use this passive ability multiple times per turn?