What do you mean by this, any particular proposals?

Ha.  No.  Believe me when I say that I'm just about the last person you would want designing policies.  (I am, however, perfectly comfortable with throwing darts at them -- shallow though it may be.)  Jerome is the man to see on that sort of thing.

Who will execute these rules and can we empower any institution or organization to such an extend?

We could do it through the WTO.  Right now, its only concern is enforcing trade laws, but it could be doing a great deal more to our benefit if we would only reform it.  (Again, I don't claim to be an expert on writing policy.)  What the WTO should, in my opinion, be used for is an international institution with the power of sanction that is, first, concerned with enforcing standards to ensure "fair trade" -- meaning, clean air and water, reduction of greenhouse emissions, and the aforementioned worker protection, along with, I'm sure, other standards -- and, second, with enforcing the "free" aspects of trade, as in ensuring open markets between countries who have agreed to its rules and regulations.  A legal, binding commitment to the first of these should be a requirement of gaining membership.  Non-members should not be allowed to enjoy the benefits of trade.

Be nice to America. Or we'll bring democracy to your country.