Operating ships: companies operating owned or chartered vessels treated as operators, except for long term bareboat charters. A company is regarded as operating a ship or inland vessel if it operates any vessel, owned or chartered, including cases where part of the vessel is chartered in under slot charter, space charter or joint charter arrangements; however, a company is not regarded as operator where the vessel has been chartered out on bareboat charter cum demise or bareboat charter terms for a specified long term period.