It is important to examine how the CISG was structured within itself; in order to identify where the relevant rules on the formation of contracts are located and their interaction with other provisions of the Convention.
It is well-worthy to examine the contract formation regime under the CISG, where a middle way between the common and civil law traditions was sought in order to achieve a system that is acceptable, efficient and suitable for the Convention’s beneficiaries, i.e. Parties to a contract which is governed by the CISG; taking into consideration the immensity, rapidity and at times complexity of international sales transactions in today’s business world.
The prevailing method of contract formation is the “offer and acceptance”, which is acknowledged in majority of legal systems as well as in a number of prominent international legal texts, including the CISG. That being said, still, contract formation is a subject which stimulates a great deal of interest for comparative law studies given that each jurisdiction has its own “flavor” when it comes to the specifics of the subject matter.
It is important to examine how the CISG was structured within itself; in order to identify where the relevant rules on the formation of contracts are located and their interaction with other provisions of the Convention. In this respect, one should first realize that the CISG comprises of four parts which respectively deal with: the scope of application of the Convention and the general provisions; rules governing the formation of contracts for the international sale of goods; substantive rights and obligations of the buyer and seller arisen from the contract; the final clauses of the Convention regulating matters such as how and when the Convention shall come into force and the rules on possible reservations and declarations.  As seen, the rules on formation of contracts are found under Part II of the Convention which deals with various issues in relation to the subject matter. That being said, provisions set out in other parts of the CISG also do have a significant impact on the contract formation regime stipulated under the Convention.
It goes without saying that “General Provisions” laid down in Part I, Chapter II of the Convention are highly relevant for all parts of the CISG, including the rules on the contract formation, as they are applicable throughout the Convention, as a whole. The General Provisions deal with the issues related to interpretation, trade usages and other general provisions with regards to the contractual form, which are often resorted when tackling issues related to contract formation.
Other than this, Part IV of the Convention is also relevant for it allows Signatory States to make certain reservations including the possibility to opt out from Part II or Part III of the Convention under the Article 92. It is interesting how this Article was introduced upon the request of the Scandinavian States in order to allow them to ratify the Convention without the Part II, who later decided to withdraw their Article 92 reservations in order to avoid confusions between merchants which would potentially put the international trade in jeopardy. That being said, pursuant to the Article 94, Denmark, Finland, Iceland, Norway and Sweden declared that both Part II and Part III of the Convention is inapplicable where the parties have their places of business in Denmark, Finland, Iceland, Norway or Sweden due to the fact that the Scandinavian countries have their own uniform Sale of Goods Acts. However, the effectiveness of this reservation is also a subject of inquiry. On the other hand, Article 96 has also significance over the contract formation regime as it allows States, whose legislation requires contracts of sale to be concluded in or evidenced by writing, make a reservation on the “freedom of form” principle stipulated under the Convention. However; the relevance of this reservation is diminishing as the States no longer impose written agreements on international sales contracts in their domestic laws.
Finally, due regard shall be given to the fact that the Convention does not govern some of the issues that are of significance for the contract formation area such as law of agency and validity of the contract or any of its terms. It is left for domestic laws to decide whether a contract is void or voidable as a result of misrepresentation, vitiated consent, fraud, lack of or limited legal capacity, illegality or abusive terms.