517. Rent.

After the disclaimer of a lease1, a landlord may prove for the loss or damage which he has sustained in consequence of the operation of the disclaimer, which is normally measured by reference to the difference between the rent and other payments which the landlord would have received in future but for the disclaimer and the rents and other payments which the disclaimer will enable him to receive by reletting2.

The assignor of a lease holding a covenant of indemnity from the assignee may, on the assignee's bankruptcy, prove for a portion of the rent until the premises can be