I understand your question, but I will answer with a different scenario. We are on a back to back with linked booking, so, I had the same question as we are staying on board from one sailing to remain in the same cabin on a second voyage. I called HAL as was informed that 3 days prior to disembarkation we would be tested for covid and that this would suffice for our second sailing. It was one less thing to worry about for us. Not sure if this is what you are asking, but that is what I learned. Call HAL with your booking number, and they will have the best answer for you scenario. Have a good trip!