BR-30: A line period cannot end before it starts

What it means

When an invoice line gives both a start date (BT-134) and an end date (BT-135) for its period, the end date must be on or after the start date.

Why it matters

A line period says when that particular item was supplied, for example the month a subscription covers. A period that ends before it starts is impossible, so the invoice is rejected.

How to fix it

Open the line with the wrong period, usually a subscription, rental or service line, and swap or correct its dates. If you build the XML yourself, the dates are in the line's cac:InvoicePeriod (UBL) or ram:BillingSpecifiedPeriod (CII).

The rule as published

If both Invoice line period start date (BT-134) and Invoice line period end date (BT-135) are given then the Invoice line period end date (BT-135) shall be later or equal to the Invoice line period start date (BT-134).

Business terms: BT-134, BT-135

Where this rule applies