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+Article 18 4. |
Article 18 4.If the contract provides for a future change of the product or price, or a discount, this shall be indicated on the bill together with the date on which the change takes place.
1. Resumen
1.1 Referencias1.2 Requisitos identificados1.3 Estándares relacionados2. Requisitos identificados
3. Estándares relacionados
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