Chief Justice John Roberts has told Congress again that the Supreme Court doesn't plan to formally adopt rules that would bind it to the same code of conduct as other federal judges.

This came in a letter released Tuesday by the court from Roberts to Senate Judiciary Committee chairman Patrick Leahy, D-Vt. Leahy wanted Roberts to make public an informal 1991 Supreme Court resolution saying justices would follow the same rules as judges on gifts, outside income, honoraria and employment.

Some lawmakers have been calling for the Supreme Court to legally bind its members to the same rules as other federal judges.

Roberts made the resolution public, but added "the court does not plan to adopt the Code of Conduct for United States Judges through a formal resolution."