In Marketing and Policy Briefing Paper No. 71 distributed recently, we outlined and assessed the effects of USDA's Tentative Final Decision amending federal milk marketing orders. These amendments are slated to go into effect on January 1, 2001, pending producer approval, with possible alterations based on comments received by February 5, 2001.2 In our discussion of USDA's Tentative Final Decision, we overlooked a key change in Class I pricing and misinterpreted related effects. We offer this addendum to correct our misinterpretation and to provide some additional comments on the decision.