A few come to mind, but Britain has recently looked at the reform of the rules governing the conduct of MPs. Very recently—last year—I was called as a witness to explain the Canadian regime to Lord.... I forget his name, but he was in charge of the review.
France has also created recently a new authority.
It's called the Haute Autorité pour la transparence de la vie publique.
There, the rules are quite harsh, basically. Their consequences are quite harsh when somebody violates the rules, both on the MP side and on the side of senior officials as well.
I have heard as well that there are some regimes in Scandinavia that are interesting—