That excerpt I pasted was from the Carnival Cruise Website: Have Fun. Be Safe. | COVID-19 Guest Protocols | Carnival Cruise Line
So is the website incorrect?
TESTING REQUIREMENTS (UPDATED 7/29/22)
Effective with sailings departing August 4, 2022, there will be no pre-cruise testing for fully vaccinated guests booked on cruises with itineraries 5 days or less. Pre-cruise testing for itineraries 6 days or longer can be conducted up to three (3) days before departure.
Except where destination requirements differ*, guests who are up to date with their vaccines may take their test within three days prior to sailing.
Up to date means a guest has received all recommended COVID-19 vaccinations, including any booster dose, when eligible.
If a guest is fully vaccinated but not up to date with their vaccines, they must take a PCR or an antigen pre-cruise COVID-19 test within three days prior to sailing.
If you are eligible for a booster and have not received one, you are not considered up to date.