6.60 A fixed price must be agreed with the submission of Final Tenders, together with a clear understanding of how long this is to be held for and how the Tender price will be adjusted in the event of delays. At each stage of the procurement process leading up to this, NHS bodies should be clear what areas of a bidder's price may not be fixed, and what factors may lead to a possible change. It is expected that any areas of price uncertainty should be minimised from when priced bids are first received, and that they should reduce as negotiations progress. Participants should remain aware at all times that bids must remain within the NHSScotland body's stated affordability ceiling.