T-0.1 - Act respecting the Québec sales tax

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57. Where corporeal movable property or services are supplied and the amount of consideration for the supply shown in the invoice in respect of the supply may be reduced if the amount thereof is paid within a time specified in the invoice or an additional amount is charged to the recipient by the supplier if the amount of the consideration is not paid within a reasonable period specified in the invoice, the consideration due is deemed to be the amount of consideration shown in the invoice.
1991, c. 67, s. 57.