[GAIUS libro tertio de legatis ad edictum praetoris. ] §33.2.8.prSi usus fructus municipibus legatus erit, quaeritur, quousque in eo usu fructu tuendi sint: nam si quis eos perpetuo tuetur, nulla utilitas erit nudae proprietatis semper abscedente usu fructu.
[GAIUS, On Legacies under the Praetorian Edict, book III.] If a usufruct is bequeathed to the members of a municipality, it is asked how long they ought to be protected in that usufruct: for if anyone protects them perpetually, there will be no utility in bare ownership, with the usufruct being always separated.
unde centum annos obseruandos esse constat, qui finis uitae longissimus esset.
Hence it is established that one hundred years must be observed, which would be the longest limit of a life.