to put forward, support and prove an action, as said above, so that a prima facie case  is made out, so with an exception, in order to ascertain whether it belongs to the exceptor  as the action does to the actor, for though an exception may lie against an  action, nevertheless, as said above, it is not everyone who may raise it.
A replication lies against an exception.
 Though at the outset an exception seems adequate, the demandant may be aided by  way of replication, as where one sues, the tenant may except on the ground of a subsequent  agreement that he not sue, against which the replication may be made by the  demandant on the ground of a later agreement that he may sue.1[An agreement that  he not sue, afterwards agreed that he may sue. Here the first agreement is nullified by  the second, not indeed ipso jure, but by way of replication.]2 And so of similar matters,  with respect to limitations and conditions put into contracts, as where it is agreed at  the making of the contract that something be done or not done, and if it is done or not  done that the [other] contracting party may do such a thing or may not, or that if it  is not done in a certain way, that then such a thing may be done, as above, [of gifts.]3
A triplication lies against a replication.
 A triplication follows a replication, and a quadruplication a triplication,4 for good  reason, and so beyond, ad infinitum. Thus an action may at the outset be said to be  good prima facie, but then nullified by an exception, and similarly, the exception may  be good but nullified by a replication, and so on.
Some exceptions are perpetual and some temporary.
 Exceptions are perpetual though they proceed from temporal actions,5 because it is  not in the tenant's power to except when he wishes, though the actor may choose when  he wishes to sue. 6In putting forward exceptions, the order described above is necessary,  though some do not observe it, perhaps because they think that, provided they  put one forward, before its time or out of order, with the protestation that the benefit  of the others be saved them, without specifying which, that if they fail in the proof  of one they may have recourse to the others.7
One may use several exceptions.
 One may use several different dilatory exceptions, provided they are raised in the  proper order, but if several peremptory [exceptions] lie, the tenant must put forward  and prove one, as is touched upon above [of actions,]8 as where several actions are  available to a person he must sue one,
1-2. D. 126.96.36.199; supra ii, 288, nn. 12-13; om: Ut si dicatur
5. Tancred, 145: fere omnes exceptiones perpetuae sunt, licet descendant a temporalibus actionibus; supra ii, 157, 293, iii, 168
6-7. Tancred, 141-2: Hunc credo rectum ordinem proponendi exceptiones fori declinatorias. Quidam tamen ordinem istum non servant, sed dum unam proponunt protestantur sibi salvum esse debere beneficium ceterarum, ut si in proposita
[probatione] defecerint possint ad alias habere recursum. Sed cautius est quod primo diximus.