I. – The following are to be included in the taxable amount:
1° Taxes, duties and levies of any kind except value added tax itself.
2° Expenses ancillary to the supply of goods or services such as commission, interest, packaging, transport and insurance costs charged to customers.
II. – The following are not to be included in the tax base:
1° Cash discounts, rebates, discounts, rebates and other price reductions granted directly to customers;
2° Sums reimbursed to intermediaries who incur expenses in the name and on behalf of their principals insofar as these intermediaries report to their principals, enter these expenses in their accounts in transitory accounts, and justify to the tax authorities the nature or exact amount of these disbursements.
III. – Sums received on deliveries of returnable packaging may be excluded from the taxable amount on condition that the value added tax relating to these sums is not charged. They must be included in the taxable amount where the packaging has not been returned within the time limits customary in the trade.