# UBL-CR-522

> A UBL invoice should not include the InvoiceLine InvoicePeriod DurationMeasure

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/ubl-cr-522

## Official rule text

A UBL invoice should not include the InvoiceLine InvoicePeriod DurationMeasure