F59 Where it is concluded that the operator has an asset of the property, it should record this asset in its balance sheet. The asset should initially be recorded at its cost and then depreciated to its expected residual value over its useful economic life (which, unless the property is to be retained by the operator on the expiry of the PFI contract, will be constrained by the term of the PFI contract). Where the contract specifies a sum for which the residual value will be transferred to the purchaser, the difference between the amount payable and the expected residual value should be accounted for in a similar way to the accounting treatment adopted by the purchaser (see paragraph F56), on the assumption that the difference is accounted for by higher or lower PFI payments during the life of the contract. If the operator is obliged to meet any liabilities as a result of the contract (eg environmental clean-up costs), these should be recorded separately, within liabilities.