Code of Federal Regulations Title 36. Parks, Forests, and Public Property § 36.223.64 Appraisal on a lump-sum value or rate per unit of measure basis

(a) Variations in lumber or other product value indices between the price index base specified in the contract and the price index actually experienced during the cutting of the timber;

(b) Variance between advertised rates and rates redetermined by appraisal at dates specified in the contract;

(c) Variance between redetermined rates and rates appropriate for changes in costs or selling values subsequent to the rate redetermination which reduce conversion value to less than such redetermined rates;  and

(d) Substantial loss of value due to physical deterioration of green timber or other physical damage to the sale area or access to the timber.