Paragraph 2 allows the parties partially to assign associated rights
and to agree to what extent the related International Interest is also assigned.
In such a case the assigned rights must be identifiable under the contract
from which they arise
Article 32(1)b of the Convention.
and must be identified before payment by the debtor can be requested.
Article 33(1)b of the Convention
Because the assignment is only partial, the parties must
find an agreement to what extent the related International Interest is
transferred.
In the absence of an agreement, it is left to the applicable
national law to determine the rights to the related International Interest.
As a prerequisite for partial assignment the underlying obligation has to be
dividable.
This may be the case if only some of the monthly instalments under
a lease are assigned while others are not, but also in the more complicated
case of two separate contracts.
In such scenario the debtor has entered into
another contract but has undertaken in the agreement with the creditor to
perform its obligation under the other contract.