[PAULUS libro sexagensimo sexto ad edictum. ] §43.21.2.prLabeo non posse ait ex aperto riuo terrenum fieri, quia commodum domino soli auferetur appellendi pecus uel hauriendi aquam: quod sibi non placere Pomponius ait, quia id domino magis ex occasione quam ex iure contingeret, nisi si ab initio in imponenda seruitute id actum esset.
[PAULUS, from the sixty-sixth book on the edict.] Labeo says that it is not possible for a covered channel to be made out of an open channel, because the owner of the land would be deprived of the convenience of driving cattle to it or drawing water; Pomponius says that this does not please him, because that convenience accrued to the owner of the land rather by opportunity than by right, unless this had been agreed upon from the beginning when the servitude was imposed.