Government of Wales Bill

I am grateful to the Minister for giving way again. He says that the cost will be minimal and I presume, given that he is going to accept the new clause, that he has had a chance to calculate in detail the costs and staffing necessary to implement it. Will he agree to place in the Library of the House those detailed calculations, which would be helpful? Will he also justify to the House the two-year period, so that I can satisfy myself that another period would not be more optimal?