CFR › Title 31 › Part 601Part 601 — Distinctive Paper and Distinctive Counterfeit Deterrents for United States Federal Reserve Notes§ 601.1— Notice and scope.§ 601.2— Distinctiveness requirement.§ 601.3— Distinctive paper.§ 601.4— Distinctive counterfeit deterrents.§ 601.5— Penalty for Unauthorized Control or Possession.