Craig, we do spend a lot of time looking at both the surface and sub surface risk as we look at new countries that we want to enter and we look at the legal structure in the company, how is drill and low enforced, arbitration processes. And then we look at the construct of the contract and so their revenue received and distributed, the currencies of those revenues that were in and so forth. All of that's around managing capital risk and ongoing revenue risk. With respect to countries like Myanmar, for example, I would actually say, Myanmar is a very mature oil and gas country, that’s been producing onshore for about better part of hundred years. We look at it and it has -- so it has structures in place that don’t exist in maybe some of the emerging East Africa countries. So, Myanmar is good example, because it's actually a country that has a very stable, legal and regulatory structure behind its oil and gas activity, both onshore and offshore down to the South of the country. Clearly, the new exploration blocks that have been opened up in the Rakhine Basin are in new provinces. But the agreements that were originally proposed by government were essentially a copy of the agreements that existed elsewhere in the country. So we knew what we were getting into when we bid on those blocks. The normal process, though, as you bid on blocks, you’re then awarded the block and then you sit with government and negotiate the final fiscal terms. We are currently in that process of negotiating the final fiscal term. So you'll find wording in our announcement is quite deliberate. It's says we've been awarded. The blocks were in the final processes of negotiating those fiscal terms and so we do that before we commit capital and that’s how we manage our capital risk in those countries. The other countries in West Africa are, again, all mature hydrocarbon producing regions. Gabon, in particular, has been producing for the many, many years. Tanzania is probably the newest, but it's had some offshore activity, as you know, and so we've already got our line of sight as to where Tanzania is going in their fiscal structures. So we do look very long and hard at the rule of law, the arbitration process and so forth and over the last couple of years Woodside has hired some external people to come in who have particular expertise in that area to make sure that we are able to enter those countries in a way and preserve it. And it’s not just those things, we get down to the level of customs duties and how do you move things in and out because often it's not just the fiscal firms, it's actually, you certainly get slapped with the bill for customer and then you realize that our drilling rig was going to trigger customs charge. So that’s the sort of detail we are getting.