Is there any Covid-19 test requirement before embarkation?

This question is specific to: Cruises / Celebrity Cruises

For Celebrity Equinox:

All guests over the age two, regardless of vaccination status, will now be required to present a negative COVID-19 test result at the time of embarkation. This test may be taken as either a PCR test or an Antigen test, conducted within 72 hours of embarkation. Each guest is responsible for making their own arrangements with an accredited testing provider as well as all associated costs. Read more at http://www.healthyatsea.com/ "