What is no more favorable treatment

1
FOLLOW

When an IMO instrument has entered into force, countries that have ratified it can
apply it not only to ships of their own flag but also to all other ships as a condition of entering their ports or internal waters, regardless of flag.  This is an important principle, commonly referred to as the principle of “no more favourable treatment”. Flag States are responsible for implementing and enforcing legislation on ships in their registries.  Additionally, IMO‟s most important conventions contain provisions to allow ships to be inspected through port State control to ensure that they meet IMO requirements.