European Union (Referendum) Bill

I am glad that my hon. Friend cautioned me against intervening too early, because he has now started to explain. What I wanted to know was why he had specified three different dates. Was it because he was not sure which would be the best of the three, was it because of the pace at which the Electoral Commission could move, was it because we were not sure when the referendum would take place, or was it because he was not sure whether any or all the amendments would be selected?