# Uniform Laws on International Sales Act 1967, Paragraph 2


However, a reply to an offer which purports to be an acceptance but which contains additional or different terms which do not materially alter the terms of the offer shall constitute an acceptance unless the offeror promptly objects to the discrepancy; if he does not so object, the terms of the contract shall be the terms of the offer with the modifications contained in the acceptance.
Article 8

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Source: https://www.legislation.gov.uk/ukpga/1967/45/schedule/2/paragraph/2n5 (the official version)
Page: https://openlegislation.uk/uniform-laws-on-international-sales-act-1967/schedule-2/paragraph-2n5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.