Ex communi clariss. et consultiss. iuris professorum ordinis, in inclyta Basiliensium Academia decreto, subsequentes (de feudis) theses

XXX.

If there are several vassals who are heirs, each shall take the oath, unless the fief has come to one of them through division, for in that case, the oath of this one alone—like that of a syndic an administrative representative of any city—suffices. However, vassals are occasionally liberated from this religious obligation if an oath was once sworn by their predecessors to the lord and his successors, or under the name of his dignity.

XXXI.

But if there are several heirs of a lord, should investiture be sought from each one? A distinction is made: whether the fief was accepted from another and then sub-infeudated, or whether it was newly constituted from his own property. In the latter case, it must be sought from the sons and daughters; in the former, only from the sons. Although the vassal may swear an oath to all of them, it is sufficient to serve only one.

XXXII.

It is asked whether a vassal is bound to provide assistance in dowrying the lord's daughter, since he is not compelled to liberate the lord if he is burdened by debt. With Zasius and Speculator referring to Durantis’s Speculum iudiciale, I believe he is bound to this by law.

XXXIII.

Conversely, a lord cannot, without the vassal's consent, transfer the fief to another person, and this is the rule. For the same causes of perfidy and broken obligations that lead to a fief being seized from a vassal, the rights of the patron are likewise removed.

XXXIIII.

It pertains to real law that when a fief has been granted, the lord is bound to deliver it, or if it is evicted lost to a superior legal claim, to provide another of equivalent value.