In return for these, the antrustion enjoyed certain valuable advantages, as being specially entitled to the royal assistance and protection; his wergeld is three times that of an ordinary Frank; the slayer of a Frank paid compensation of 200 solidi, that of an antrustion had to find boo.
The antrustion was always of Frankish descent, and only in certain exceptional cases were Gallo-Romans admitted into the king's bodyguard.
The antrustions, belonging as they did to one body, had strictly defined duties towards one another; thus one antrustion was forbidden to bear witness against another under penalty of 15 solidi compensation.