Thanks Apcbg for posting that, its very helpful to the discussion at hand.  Its clear that the convention only refers to future establishments, it had no material effect on prior sovereignty claims.  Aside from that, the 1771 treaty between Britain and Spain regarding the Falkland Islands is a de facto Spanish recognition of the British sovereignty claim.  Claiming that the convention repudiates sovereignty is obviously presenting a partisan POV and I suggest that it is removed.