[IDEM libro septimo disputationum. ] §45.1.52.prIn conuentionalibus stipulationibus contractui formam contrahentes dant.
[THE SAME, in the seventh book of Disputations.] In conventional stipulations, the contracting parties give form to the contract.
enimuero praetoriae stipulationes legem accipiunt de mente praetoris qui eas proposuit: denique praetoriis stipulationibus nihil immutare licet neque addere neque detrahere.
On the other hand, praetorian stipulations receive their law from the mind of the praetor who proposed them; therefore, in praetorian stipulations it is permitted to change nothing, neither to add nor to subtract.
§45.1.52.1Si quis uacuam possessionem tradi promiserit, non nudum factum haec stipulatio continebit, sed causam bonorum.
If anyone has promised that vacant possession be delivered, this stipulation will contain not a bare fact, but the legal cause of the property.