Are you talking about international corporate law, Costa Rican law, or what?
This site is very well written and presented, as regards the quality of the English used:
http://pdba.georgetown.edu/Constitutions/constitutions.htmlThere are many links to follow here.
The political database of the Americas has many more links.
I shall try to remember to come back.
In case this has not helped, please tell us what country's laws we need to consider.
Buena suerte!