Shares of Norwegian Cruise Line Holdings Ltd. /zigman2/quotes/204183397/composite NCLH -3.85% fell 0.6% in premarket trading Wednesday, after the cruise operator unveiled the next phase of its schedule of restarts from some Europe cruises but said it was still waiting for feedback from the U.S. Centers for Disease Control and Prevention (CDC) on its plan to restart U.S. sailings on July 4. The company said its Oceania Cruises will resume sailings to Scandinavia and Western Europe in August and its Regent Seven Seas Cruises will resume cruising from the U.K. starting in September. Norwegian had submitted its plan to resume U.S. sailings to the CDC on April 5, saying its plan included the requirement that all guests and crew be fully vaccinated. Later that week, the state of Florida sued the CDC in an attempt to force the restart of cruises, which have been suspended for more than a year as a result of the COVID-19 pandemic. Norwegian's stock has rallied 19.9% year to date through Tuesday, while the S&P 500 /zigman2/quotes/210599714/realtime SPX +0.51% has gained 11.5%.