Article 420 of Civil Code

1 - If the original obligation is secured by real security provided by the debtor, agreement on its transfer to the new obligation shall be made subject to the following provisions: a- If the novation is effected by changing the debt, the creditor and the debtor may agree to the transfer of the security. b - If the novation is effected by changing the debtor, the creditor and the new debtor may agree to retain the security without the need for the consent of the original debtor. c - If the novation is effected by changing the creditor, the parties to the novation may agree to retain the security. - If the real security was provided by a third party, it shall not be transferred except with the consent also of the person who provided it. - In all cases, an agreement to transfer real security shall not be effective against third parties unless it is made at the time of the agreement on novation and is within limits that do not prejudice such third parties, subject to the provisions governing registration.