3.23 Procuring Authorities should review their payment mechanism on at least an annual basis in the pre-operational phase as part of their budgeting processes to understand any fluctuations to the forecast unitary charge since financial close. For example:
o Changes in requirements (capital or operational) as discussed in 3.9
o Inflation
o Staff cost changes if retained staff salaries are a retained risk
o Pass through costs such as rates
o Energy - unit costs may be retained
3.24 Procuring Authority finance departments will want to ensure a "no surprises" approach to the Unitary Charge when operations commence.