# FX-SCH-A-000161

Source: https://xmlvalid.com/rules/FX-SCH-A-000161

> Element 'ram:SubjectCode' may occur at maximum 1 times.

- Level: error
- Rule sets: Factur-X BASIC WL rules 1.09, Factur-X BASIC rules 1.09, Factur-X EN 16931 rules 1.09.2, Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:ExchangedDocument/ram:IncludedNote`
- Test: `count(ram:SubjectCode)<=1`

Validate a document against these rules: https://xmlvalid.com/validate