Scotland Bill

The point is that there would be a reduction in the block grant, because the revenues from the aggregates levy would be going to the Scottish Government. If it was subsequently found that the aggregates levy in its current form was not legal, either we would have to readjust the block grant or the Scottish Government would have to bear the shortfall. I shall move on to amendment 57 and new clause 16. The Calman commission recommended the devolution of the UK's air passenger duty, not a general power to tax air travel, which is what the amendment seeks. The UK Government are exploring changes to their aviation tax system, as stated in last year's June Budget, and will look at devolution of this tax base in that future work. However, it is not appropriate to devolve aviation tax until these changes have been explored, with any major changes subject to consultation, and a decision on the future of UK aviation tax made. To do otherwise would mean that the Scottish Parliament would have to plan the future of their new tax without the context of the UK version. I would also like to answer the point about the process of a new tax. Clause 24(6) provides that any new tax would need to be approved by the Scottish Parliament, under section 80B of the Scotland Act 1998. That would clearly apply in these circumstances. I turn to amendment 60 and new clause 17. The Calman commission recommended that corporation tax not be devolved. The Scottish Parliament has endorsed this, although it wants to stay engaged in any future discussions on corporation tax devolution. Both the Calman commission and the Scottish Parliament recognised very good reasons why not to devolve the tax. First, the Calman commission concluded that if comparable levels of public services were to be maintained, the scope for substantive reductions in the rate of corporation tax in Scotland was limited, unless the Scottish Government are able to increase revenues from other sources. As the hon. Member for Glasgow North said, under European law there will have to be a reduction in the block grant commensurate with the value of the reduction in the corporation tax rate. Secondly, the commission also believed that the potential administrative impacts of such a move were significant. The creation of compliance costs to businesses operating on either side of the border, as well as the increased collection costs to the Government, would be undesirable in the present economic climate.