U.S. Supreme Court Justice Elena Kagan said on Thursday called for an enforcement mechanism to be added to the new ethics code.

Kagan said she supports the ethics rules but there isn't a clear way to enforce them.

“The thing that can be criticized is, you know, rules usually have enforcement mechanisms attached to them, and this one — this set of rules — does not,” Kagan said during an annual judicial conference organized by the 9th Circuit.

“Both in terms of enforcing the rules against people who have violated them but also in protecting people who haven’t violated them — I think a system like that would make sense,” she said.