During implementation, changes to the project risk profile or in capital markets may mean the PPP company can replace or renegotiate its original debt on more favorable terms. As described in Section 1.4: How PPPs Are Financed, many PPP contracts set out rules for determining and sharing the gains from refinancing. For example, in 2004 the United Kingdom's Treasury introduced into its standard PFI contracts a 50:50 split of any refinancing gain between the investors and the government. The EPEC Guide to Guidance on PPPs [#83, page 35] also provides a succinct summary of how refinancing can be treated in the PPP contract