Hello Stu,
In the answer to Captain Kool, I gave the references to the full text of the United Nations Convention on the Law of the Sea, as the necessary references to signatories, reservations, etc...
http://www.un.org/Depts/los/convention_agreements/texts/unclos/UNCLOS-TOC.htm
Concerning the boarding you question, I dont agree with you.
Navy ships (and assimilated) are required to board suspected ships, as explained in full details in Part VII High Seas to the Convention.
Did you miss
my former answer? Well, I missed the reference then, although I had the Article Nb! Sorry!
Regards,
Luc
Here it is
Hello Stu,
As a rule (article 110), navy ships (of any nation) have the right of visit and may board your ship if they suspect your ship is engaged in piracy, slave trade, illegal broadcasting (!), has no nationality (art. 92.2), or hides her flag being in reality of the same nationality of the navy ship herself.
The definition (art. 101) of piracy is not very restrictive "any illegal acts of violence or detention, or any act of depredation,...." and cannot be the fact of a naval ship. (They commit illegal acts, collateral damage, errors, mistakes, war crimes, acts of war ...).
Idem slave trade (Spambot, children, ...).
And of course, Captain Kool is quite right, Art. 92.1 says:
Ships shall sail under the flag of one State only and, save in exceptional cases expressly provided for in international treaties or in this Convention, shall be subject to its exclusive jurisdiction on the high seas.
So, if you are suspect, your freedom of the seas could change if you damage the paint of the boarding party!
Regards,
Luc