In principle, towage services are provided by Greek pusher crafts. Pusher crafts may operate under foreign flag without prejudice to the condition of reciprocity. They are used in prescribed cases, one of which is direct and serious need when local towage services (Greek pusher crafts) are not available. For unofficial version see: http://www.et.gr/idocs-nph/search/pdfViewerForm.html?args=5C7QrtC22wF6rlIz2Gsd0ndtvSoClrL8_q7ut2PVjhp5MXD0LzQTLWPU9yLzB8V68knBzLCmTXKaO6fpVZ6Lx9hLslJUqeiQCf8QWCvQ6XpV7BoniEYPymzgr8zG1ESDiB1azlDNfow.