In Alta Proditione Nullus Potest Esse Accessorius Sed Principalis Solummodo Law and Legal Definition
Latin maxim in alta proditione nullus potest esse accessorius sed principalis solummodo means in high treason no one can be an accessory but each one is a principal.
The following is an example of a case law explaining the maxim:
“In treason all are principals. There are no accessories.” [Ex parte Bollman, 8 U.S. 75, 115 (U.S. 1807)].