1. The relationship between assignor and assignee under a voluntary assignment or contractual subrogation of a claim against another person (the debtor) shall be governed by the law that applies to the contract between the assignor and assignee under this Regulation.
2. The law governing the assigned or subrogated claim shall determine its assignability, the relationship between the assignee and the debtor, the conditions under which the assignment or subrogation can be invoked against the debtor and whether the debtor's obligations have been discharged.
3. The concept of assignment in this Article includes outright transfers of claims, transfers of claims by way of security and pledges or other security rights over claims.