`ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once. `ValuationMethodUsed` MUST exist at least once.