Centers for Disease Control and Prevention (CDC) in Washington has published the next two phases of the Framework for Conditional Sailing Order (CSO) for cruise ships operating or seeking to operate in U.S. waters.

CDC published an 11 page technical instructions for cruise ship operators preparing to conduct simulated trial voyages in advance of restricted passenger voyages under a Covid-19 Conditional Sailing Certificate.

“With the issuance of these next two phases, cruise ship operators now have all the necessary requirements and recommendations they need to start simulated voyages before resuming restricted passenger voyages and apply for a Covid-19 conditional sailing certificate to begin sailing with restricted passenger voyages,: it said in a statement.

CDC said it may adjust these requirements and recommendations based on public health considerations and other factors.