Norwegian Cruise Line Holdings

Norwegian says its legal action is a "last resort." Meantime, Carnival will start requiring unvaccinated people older than 12 in Florida to buy travel insurance and emergency medical evacuation coverage.

Norwegian says it is in talks with Gov. Ron DeSantis' staff and attorneys “to ensure that we can offer the safest cruise experience for our passengers.”

Cruise ships that have been stuck in port since the pandemic struck are starting to trickle back into Florida. But Tampa Bay won't see any cruise lines return until the fall.