Where a disparate impact is shown, the plaintiff can prevail without the necessity of showing intentional discrimination unless the defendant employer demonstrates that the practice or policy in question has a demonstrable relationship to the requirements of the job in question.
The Chief Justice only presides at presidential impeachment trials and will serve as our example to illustrate the process. In non-presidential impeachment trials, the Vice President or Senate pro tempore (temporary president of the Senate) presides at the trial.
Since both these roles were removed from that office by the Constitutional Reform Act 2005, which created the Lord Speaker to preside over the Lords and made the Lord Chief Justice head of the judiciary, it is not certain who would preside over an impeachment trial today.