Singapore Maritime and Port Authority (MPA) allowed crew changes.
Seafarers who are signing off must be able to confirm that they have not been off the ship within the past 14 days and have not been ill during that period. They must have a fit-for-travel medical certificate issued by a Singaporean doctor, and they must be able to show documentation proving the reason for their departure - e.g., the expiry of their employment contract or the sale/purchase agreement showing that their ship has changed hands.