Well, usually the way we approach the distinction generally between budget implementation measures is that it will depend on how important it is to have a measure come into effect quickly. This is a measure that will come into effect on royal assent, and it was felt that it was important to get this measure in as quickly as possible. It will also depend on the complexity of the drafting for various measures and the desirability of consultation on drafting of measures. Those are the reasons why the first one was included.
On May 16th, 2012. See this statement in context.