Who Should Overlook Whistle Blower Protection Legislation?

There are so many different approaches to this issue, it's hard for countries that have a nacent framework to really bench mark with others. I think the big question for countries when implementing whistle blow protection legislation is who responsible? Which agency should have oversight for this legislation? The netherlands is one of the few countries in the world that has stand alone, comprehensive whistle blower protection legislation. And an interesting example to hilight frome a private sector perspective is in australia.