Article 32 — Formal requirements of assignment
1. An assignment of associated rights transfers the related international interest only if it:
(a) is in writing;
(b) enables the associated rights to be identified under the contract from which they arise; and
(c) in the case of an assignment by way of security, enables the obligations secured by the assignment to be determined in accordance with the Protocol but without the need to state a sum or maximum sum secured.
2. An assignment of an international interest created or provided for by a security agreement is not valid unless some or all related associated rights also are assigned.
3. This Convention does not apply to an assignment of associated rights which is not effective to transfer the related international interest.