168. The defendant may ask that the suit be stayed for the time fixed by law or by the judgment granting his motion:(1) when the time allowed him to deliberate and exercise an option in a succession matter has not expired;
(2) when he has the right to demand the discussion of the property of the principal or original debtor;
(3) when he has the right to demand the execution by the plaintiff of some precedent obligation;
(4) when he has the right to demand that the plaintiff declare his option between different recourses that he has joined, or that co-plaintiffs disjoin separate actions which they have joined;
(5) when he wishes to implead a third party whose presence is necessary to permit a complete solution of the question involved in the action, or against whom he claims to have a recourse in warranty;
(6) when the motion to institute proceedings is affected by some irregularity which he has an interest to have corrected;
(7) when he has the right to obtain, in respect of any vague or ambiguous allegations of the demand, particulars necessary for the preparation of his defence;
(8) when he has the right to require that an exhibit the plaintiff intends to refer to at the hearing be communicated to him by the plaintiff.