The passage discusses the issue of whether the Scottish Government has the authority to block the UK Parliament from reserving powers returned to the UK after leaving the EU. Currently, reserved powers are outlined in Schedule 5 of the Scotland Act 1998. Leaving the EU through Article 50 and the Great Repeal Bill would repeal the European Communities Act of 1972, ending EU jurisdiction in Britain. However, this would not impliedly repeal or amend Schedule 5 of the Scotland Act, meaning the UK Parliament would need to expressly take such action to reserve more powers rather than it happening automatically.