May 18, 2021: The State of Florida's lawsuit to reopen the cruise industry against the CDC and the U.S. Department of Health and Human Services heads to mediation. May 25, 2021: Under the Conditional Sail Order, Royal Caribbean International becomes the first cruise line to receive the CDC's approval for a simulated voyage with volunteers. May 26, 2021: The CDC significantly relaxes cruise ship regulations for passengers and crew that have been vaccinated against COVID-19, allowing a quicker restart of the industry. June 17, 2021: Seven months after raising it, the CDC lowers its warning against cruise travel from Level 4 to Level 3. June 26, 2021: As more cruise lines get ready for test voyages, Celebrity Cruises becomes the first cruise major company to resume service in North America. Sailing from Port Everglades, the Celebrity Edge launches the first U.S.-based cruise in over 15 months.