Section 1-6-105 - Proceedings when defendants not all served(a) When service has been made on one (1) or more defendants, but not on all, the plaintiff may proceed as follows: (i) If the action is against defendants jointly indebted upon contract, he may proceed against the defendants served, unless the court otherwise directs; or (ii) If the action is against defendants severally liable, he may without prejudice to his rights against those not served, proceed against the defendants served.