8A [Interpretation of party's statements or other conduct: intent of party making statement or engaging in conduct];

9A [International usages: contracts or contract formation];

11A [Writing or other formality for conclusion of contract: not required];

14A [Criteria for an offer: definiteness of key conditions and intention to be bound];

18A3 [Criterial for acceptance: sileance or inactivity in and of itself insufficient[]

19B ["Acceptance" of offer with immaterial modifications]