Rule library
UAD1172FatalField 22.07.17Sales Comparable #n

The unit identifier must be unique.

Where this rule lives in the report

Sales Comparison Approach
Structure ID | Unit ID
Unit(s); Interior Quality and Condition

Report Section and Report Subsection as the GSEs define them — the black tab and grey bar you already read on the URAR.

Severity
Fatal — this blocks your UCDP submission and must be fixed before delivery.
Triggered when
@ValuationUseType = "SalesComparable" and UnitIdentifier is not unique across all instances of PROPERTY_UNIT_DETAIL
Data Point Name
UnitIdentifier
Unique ID
1800.0159
Report Field ID
22.07.17
What this field means
An unique alphanumeric string used to identify and/or differentiate between multiple units located on the property.

Seen in the sample reports

How this field is populated in the official UAD 3.6 sample scenarios.

Primary DwellingSubject
Unit 1Subject

More rules in “Sales Comparison Approach”