677. The account is deemed to have been admitted if the party that required it has not contested it within 15 days after notification. Any remaining balance is then due.
The party may obtain and execute judgment for the remaining balance, without prejudice to its right to contest the remainder of the account. If the party contests it, the party files its grounds and their justification. The grounds are deemed valid if, within 10 days after notification, the party required to account has not filed its grounds and their justification. After the filing of grounds, the parties proceed to trial.
The judgment on the contestation must determine the precise balance of the account.