It's not a unique policy approach. It's fair to say that if the WHO report highlights this, they did a survey of all the member states. The diversity in approach is striking. Some countries have banned electronic cigarettes outright. Others have no regulatory controls at all. Then there is a whole bunch in the middle. It's fair to say that there is no “one size fits all”. It really does depend on a country's unique structures, unique laws, and that country's analysis of the state of the evidence and what side they come down on.
On October 21st, 2014. See this statement in context.