I warmly congratulate my hon. Friend on this extremely worthwhile Bill. It really is a superb effort and I am grateful to him for it. I am puzzled, however; perhaps I should have asked this question on Second Reading. Who defines whether the person is terminally ill within 12 months? After all, many diagnoses of terminal illness may well last longer than 12 months, and some people may have no such diagnosis. Where does the six or 12 month-period come from? Who decides it, and what is the certification that that is the case?