Risk is basically the product of hazard and exposure. Basically, the risk-based model gives you two leverages to control the issue. Either you can control the hazard or you can control the exposure. That is the beauty of that kind of a model. You can control either one of them.
If you go for the hazard-based model, you control only the hazard and that's it. Hazard is an intrinsic characteristic of a material, so really it's the only one lever you have. From a regulatory perspective, definitely we'd like to get the flexibility.