Well, I don't really know too much about the Law 70, except that I see references to it in various articles from time to time.
It's the law that outlines Afrocolombian ancestrial territorial rights in Colombia. Of course, getting a law on the books and getting the law implimented are two different things, especially in Colombia.
In my "Blacks in Colombia" thread in the "African Diaspora" folder there are several articles about Law 70. Here's a search page for the articles in that thread that contain the phrase 'Law 70".
A couple of years ago, while we were visiting Colombia, I purchased a huge Atlas of Colombia (for $150, but worth every penny). In it are full page maps of the black territories and indigeonous territories under Law 70 and the corresponding laws concerning indigeonous peoples.
A friend on another forum once said that he might try to translate the Law 70 into english sometime. So far as I know, there is no english translation available.
I haven't ever had the chance to read the spanish version (a much more time consuming process for me than reading english!), but here's a link to the full text of Law 70 for anybody who reads spanish and is interested, and also for reference for myself when I get a chance to read it.