New York Judiciary Law Section 17 - Judge prohibited from practicing in cause which has been before him.

  17. Judge prohibited from practicing in cause which has been before
  him. A judge or surrogate or former judge or surrogate shall not act  as
  attorney   or  counsellor  in  any  action,  claim,  matter,  motion  or
  proceeding, which has been before him in his official character.

Last modified: February 3, 2019