Historically, across the world, this seeming urgency to realise the productivity of oilfields and gasfields has meant that due weight wasn't always given to the legacy of those works, nor the thought to who would be responsible and how, and that's what this bill addresses. It ensures that those who undertook and profited from petroleum activities will pay a fair share for the cleaning up, the decommissioning, or any remedial work, and that it doesn't fall fully to the Crown, to landowners, nor to taxpayers. 