In the old system, the former Imperial House Law article 52 defined the disciplinary punishment for the Imperial Family members including the deposition of privileges, and it was legally viable to disinherit a crown prince.
なお、旧制度下においては、旧皇室典範第52条が特権の剥奪等も含めた皇族に関する懲戒を定めており、廃太子も法的に可能であった。