6.3 Additional capital expenditure arising from an unforeseeable general change in law occurs on a very occasional basis. Contractors have, however, been required in the past by funders to ensure that funds were in place to absorb the cost if the risk were to occur. As a result the public sector has been paying a high premium to transfer a risk that in practice has rarely materialised. Under PF2, the public sector will retain that risk and secure better value for money.