[German version]

(from iubere, to order). A unilateral declaration which acts as a legal command or authorization. In private law iussum is found in particular 1. as a direction by someone in authority to those under his authority (slaves or children of the house) to perform a specific legal act, e.g. to acquire something for him; 2. as authorization by the person in authority to a third person to conduct a particular transaction with someone under his authority at his expense (for which the person in authority takes responsibility by means of actio quod iussu); 3. at the  delegatio as autho…