[MARCIANUS libro tertio institutionum. ] §7.1.38.prNon utitur usufructuarius, si nec ipse utatur nec nomine eius alius, puta qui emit uel qui conduxit uel cui donatus est uel qui negotium eius gerit.
[MARCIANUS, in the third book of Institutes.] A usufructuary does not use the usufruct if neither he himself uses it nor another in his name, such as one who has bought it, or who has hired it, or to whom it has been donated, or who manages his affairs.
plane illud interest, quod, si uendidero usum fructum, etiamsi emptor non utatur, uideor usum fructum retinere,
Clearly there is this difference, that if I sell the usufruct, even if the buyer does not use it, I am deemed to retain the usufruct,