[GAIUS libro secundo institutionum. ] §28.1.4.prSi quaeramus, an ualeat testamentum, in primis animaduertere debemus, an is qui fecerit testamentum habuerit testamenti factionem, deinde, si habuerit, requiremus, an secundum regulas iuris ciuilis testatus sit.
[GAIUS, in the second book of the Institutes.] If we inquire whether a testament is valid, we must first of all observe whether the person who made the testament had the capacity to make a testament; next, if he had it, we shall inquire whether he made his testament according to the rules of the civil law.