I've got a post on the increasing efforts to create voluntary, or in some cases mandatory, responsibility for businesses regarding human rights up over at RegBlog. Here's a bit of it:
International businesses must now decide whether to sign on to a lengthy and disparate list of principles and standards that aim to promote human rights. Sometimes associations of regulators promulgate these human rights standards for businesses; other times non-governmental organizations promulgate them and ask businesses to sign them. Regardless of who adopts them, these “voluntary” standards constitute a different form of regulation, and not just because of their subject matter. In promulgation, content, and authority, these efforts do not entail traditional rulemaking or adjudication.
But human rights standards are a growth industry. In fact, it is fair to say that the obligation of businesses to consider human rights is at a turning point. Although business-based standards to improve human rights are all less than a decade old, they are gaining adherents, even among regulators. Even the U.S. Securities and Exchange Commission (SEC) and the European Union have now announced rules that discourage the use of conflict minerals in manufacturing. Other countries are following suit in restricting trafficking in conflict diamonds, a phenomenon which I examine further in this paper.
You can find the rest over here, if it's the sort of thing you like.