The LPG ship Arago, from Australia, was banned from the port yesterday as several of its crew had travelled on a flight earlier in the month where a passenger was diagnosed with Covid-19.
However, a spokesperson for Lyttelton Port says all of its crew have tested negative - bar one whose result indicates a historic case which is no longer infectious.
The Canterbury District Health Board has advised Lyttelton Port that a marine pilot can board the vessel and pilot it to a berth.
No crew will be disembarking the vessel or carrying out any duties while in Lyttelton.