[PAULUS libro quinquagesimo secundo ad edictum. ] §39.4.4.prSi publicanus, qui ui ademit, decesserit, Labeo ait in heredem eius, quo locupletior factus sit, dandam actionem.
[PAULUS in the fifty-second book on the Edict.] If a publican who has taken away anything by force should die, Labeo says that an action should be granted against his heir to the extent that the heir has been made richer thereby.
§39.4.4.1De rebus, quas in usus aduehendas sibi mandant praesides, diuus Hadrianus praesidibus scripsit, ut, quotiens quis in usus aut eorum, qui prouinciis exercitibusue praesunt, aut procuratorum suorum usus sui causa mittet quendam empturum, significet libello manu sua subscripto eumque ad publicanum mittat, ut, si quid amplius quam mandatum est transferet, id munificum sit.
Concerning the things which governors order to be imported for their own use, the divine Hadrian wrote to the governors that, whenever anyone, for his own needs, sends someone to buy either for the use of those who govern provinces or armies, or for the use of their procurators, he should indicate this in a document signed with his own hand and send it to the publican, so that, if he transports anything more than what was ordered, it shall be subject to tax.
§39.4.4.2In omnibus uectigalibus fere consuetudo spectari solet idque etiam principalibus constitutionibus cauetur.
In almost all taxes, custom is usually observed, and this is also provided for by imperial constitutions.