Thanks for a good question. --- It is really depends on the robustness of the governance system. You are right in suggesting that in many countries that can open the floodgates to sub-state entities signing bad foreign agreements....Example: Mexico allows its provinces to sign these, but only after MFA permission. They have cases where this permission has not been sought. Australia has the same problem....I think I should amend that reference.

Source author: Kishan S Rana kishanrana@gmail.com