Under the current procedure, as I understand it, SIs are not amendable. However, if I am incorrect on that, I will come back to the noble Lord.
As I said, these measures will be supplemented with three statutory instruments subject to the negative procedure on exercise of regulatory functions, appeals and charging. By grouping powers in this way we hope to provide clarity for parliamentarians and potential operators on the regulatory requirements for each type of activity while minimising the amount of duplication between the various instruments.
The noble Lord, Lord Rosser, referred to the timescales. I confirm that we currently intend to lay these SIs from summer 2019—subject, as he said, to government priorities and parliamentary time. This will allow time for more detailed policy development and consultation as well as the drafting of the extensive range of legislation and guidance considered necessary. We envisage holding formal consultations on the draft regulations and the guidance starting in late 2018. We will continue to invite the views of all interested parties—including trade unions, my noble friend Lord Balfe will be pleased to know—throughout the development of the secondary legislation.