OBS_VALUE: The Ministry of Communications and Transport might issue a temporary permit in favour of foreign flagged and operated vessels, if it can establish that no other Mexican vessels of similar technical conditions are available. Such temporary permit is valid for an initial period of three months, but renewable six more times (Article 240 of the Regulation of the Maritime Law). See : http://www.sct.gob.mx/fileadmin/CGPMM/estaciones/permisos_temporales_emb_ext_01.pdf. Furthermore, repositioning of empty containers between domestic ports is allowed for foreign vessels engaged in high-sea maritime freight transport services. However, feedering is not allowed.