Constitutional Reform and Governance Bill

Although it purports to be United Kingdom-wide, the Bill regrettably ignores the constitutional debate that is raging up in Scotland. The Secretary of State's party, along with the Conservatives and the Liberal Democrats, engaged in the Calman commission process. That commission recommended that the appointment of chief civil servants should be devolved to Edinburgh. This is the first opportunity that the House has had to legislate for that. Why is such a measure not included in the Bill?