For example one that is happening now where I work, with welding helmets/masks. The new IBP is to use forced air venting. In this example IBP is great, way better for protecting the workers than what the law says.

We audited all the contractors that come to site, they have already been using these or similar which is great to see. But this is situation where just following the law (eye and face protection) is a 50th of the cost. All of the fumes are still available to be inhaled by the worker under the law, IBP is so far ahead that any future court cases that happen because of lung damage happening now from welding fumes will look at IBP and not the law.