# ibr-073

Source: https://xmlvalid.com/rules/ibr-073

> A date MUST be formatted YYYY-MM-DD in (ibt-002), (ibt-007), (ibt-009), (ibt-026), (ibt-072), (ibt-073), (ibt-074), (ibt-134), (ibt-135).

- Level: error
- Rule sets: PINT Billing rules 1.1.3, PINT Billing rules (as shipped with PINT AE) 1.0.4
- Context: `cbc:IssueDate | cbc:DueDate | cbc:TaxPointDate | cbc:StartDate | cbc:EndDate | cbc:ActualDeliveryDate`
- Test: `string-length(text()) = 10 and (string(.) castable as xs:date)`

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