14. Where several deeds evidence the same transfer, the obligation to pay duties arises from the making of the first deed. No obligation to pay duties shall exist if the other deeds do not effect any new transfer inasmuch as the duties arising from the first deed have been paid or payment thereof has been deferred, or in the case of an exemption.
A deed of transfer affecting a previous deed between the same parties gives rise to the payment of duties as if it were a separate transaction, except to the extent that the rights of the transferee and the consideration remain unchanged.