The sources of Index will be as listed in the Tables of Adjustment Data enclosed in Contract Agreement document. It could be Index derived from the Nepal Rastra Bank such as National Urban Consumer Price (Overall Index) in or (2) different sources agreed up-on in the Tables of Adjustment Data for different inputs. Similarly confirm base values [costs] of the agreed inputs [labour, Goods and other inputs to the Works] at agreed date, because these are the BMs to determine rises/falls of price of each input at particular date refer▬►FIDIC, Multilateral Development Bank Harmonized Edition March 2006, Clause 13: VARIATIONS AND ADJUSTMENTS, Sub-Clause 13.8: Adjustments for Changes in Cost, refer▬►Examples of the “Tables of Adjustment Data” of ICB/NCB Contracts including detail calculation of CPA