The document discusses the common law doctrine of privity of contract, which states that only parties to a contract can acquire rights or obligations under that contract. It provides definitions and examples to illustrate this principle, including the 1861 case of Tweedle v Atkinson. It also outlines some exceptions to the privity rule, such as assignments, agency relationships, restrictive land covenants, and third-party insurance contracts. Assignments allow the benefit of a contract to be transferred to a third party through a transaction between the original party and the new assignee.