De iure singulari liber singularis
Dig. 1,3,16Paulus libro singulari de iure singulari. Ius singulare est, quod contra tenorem rationis propter aliquam utilitatem auctoritate constituentium introductum est.
Paulus, Sole Book on Special Law. Special law is that which has been introduced by the authority of those establishing it against the tenor of a legal principle, on account of some particular advantage.
Dig. 7,1,63Paulus libro singulari de iure singulari. Quod nostrum non est, transferemus ad alios: veluti is qui fundum habet, quamquam usum fructum non habeat, tamen usum fructum cedere potest.
Paulus, On Private Law. We can transfer to others what is not our own; for example, where a man has land, even though he has not the usufruct, still he can grant an usufruct to another party.
Dig. 24,3,54Paulus libro singulari de iure singulari. Maritus facere posse creditur nullo aere alieno, item socius, item patronus parensve: at is, qui ex donatione convenietur, omni aere alieno deducto facere posse intellegitur.
Paulus, On Individual Rights. The ability of a husband to pay is estimated without the deduction of any debt; and the same rule applies to a partner, a patron, and a parent. Where, however, anyone is sued on account of a donation, her pecuniary resources are estimated after all his debts have been deducted.