Paragraph 1

A declaration of acceptance of an offer shall have effect only if it is communicated to the offeror within the time he has fixed or, if no such time is fixed, within a reasonable time, due account being taken of the circumstances of the transaction, including the rapidity of the means of communication employed by the offeror, and usage. In the case of an oral offer, the acceptance shall be immediate, if the circumstances do not show that the offeree shall have time for reflection.