Uniform Network Code (UNC) 395: 'Limitation on Retrospective Invoicing and Invoice Correction' and 398: 'Limitation on Retrospective Invoicing and Invoice Correction (3 to 4 year solution)'
Correspondence and other
The UNC currently allows for reconciliations of invoices to take place up to 5 years from the date the charge applies to; we have accepted a modification to reduce that to 4 years and rejected a proposal to reduce it to a maximum of 3 years.