"Cabotage is a term universally adopted in the international maritime community to mean the reservation of maritime coastal trades for ships registered or licensed in the country concerned. The word is French in origin meaning coastal sailing. Nearly every country in the world with a coast of its own regards coastal shipping as an integral part of its domestic transport system. For some countries it is not a big issue where there is a short coastline with one or two ports. For others with very large coastlines opening up domestic transport sectors to foreign competition is something they have persistently regarded as non-negotiable in international fora.

The extent to which each country imposes cabotage varies considerably. Among the most rigid and exclusive are the U.S., Brazil and Indonesia, whilst among the least restrictive are Canada, Italy, Uruguay and Australia, which have no ownership, construction, or flag of registration restrictions on vessels seeking to trade on their coasts." http://www.asa.com.au/whatsnew.asp
Except if it involves an airport.