The first stage in determining whether a contractual right can be assigned is whether it is characterised as a chose in action.
A right that is a chose in action is a personal proprietary right that can be transferred to a third party at law or in equity according to the formal rules governing the transfer of such rights.
The relevant (and assignable) chose may be the benefit of the contract as such; that is, the bundle of rights, powers, privileges and immunities created by the contract rather than a particular right conferred by a term of the contract.
Some individual rights may be considered separately for the purpose of assignment because they are sufficiently discrete and independent of other provisions of the contract