The Supreme Court has adopted a formal ethics code for the first time in its history, bowing to public and congressional critics who demanded such a policy in the wake of reports about unreported luxury travel by justices and influence campaigns aimed at the court.

All nine of the court’s current justices endorsed the code, which generally tracks existing rules for lower court judges but includes some special provisions addressing the Supreme Court’s “unique institutional setting.”

The court said the code “for the most part” reflects longstanding practice, but was meant to “gather in one place the ethics rules and principles that guide the conduct” of the justices.