Art. 14(1)(1) defines the prerequisites a proposal has to meet to be considered an offer:
(1) A proposal for concluding a contract addressed to one or more specific persons constitutes an offer if it is sufficiently definite and indicates the intention of the offeror to be bound in case of acceptance.
Whether these requirements are fulfilled is determined by way of interpretation of the statement under Art. 8. Apart from the rare exceptions in which Art. 8(1) is applicable, the standard will usually be an objective one, i.e. the view of a reasonable third person in terms of Art. 8(2).