Use the DescriptionCode sub-element of the InvoicePeriod element to model this information.

Elements

Element	Description
`Invoice/InvoicePeriod/DescriptionCode`	Specify one of the allowed values.

Restrictions

You must use one of the following values:

Value	Description
35	According to the date of turnover
432	According to the date of payment
3	According to the invoice issue date
0	For book approval

Example

<ubl:Invoice>
    <!-- Code omitted for clarity -->
    <cac:InvoicePeriod>
        <cbc:DescriptionCode>3</cbc:DescriptionCode>
    </cac:InvoicePeriod>
    <!-- Code omitted for clarity -->
</ubl:Invoice>