I emailed Safe Passage tonight and they responded with this:
Good Evening,
Thank you for reaching out. Current requirements are: Any fully vaccinated guest who wishes to apply for 90 day recovered status will need to provide their
proof of vaccination, their previous positive Covid test (taken between 90 and 11 days prior to their sail date), AND a current signed letter from their doctor stating that they are recovered from Covid and it is safe for them to travel. If a guest's 90 Day Recovered application is approved they will
NOT need to take the embarkation NAAT test at port. Documents need to be uploaded into Safe Passage before sail date for validation. I hope this helps.