The Alcohol and Tobacco Tax and Trade Bureau (TTB) is amending its regulations pertaining to the production of wine to add to the list of materials and processes authorized for the treatment of wine and of the juice from which wine is made, and to expand the authorized uses of certain materials already authorized under the regulations. TTB is finalizing amendments to the regulations proposed in a notice of proposed rulemaking, Notice No. 164, with some changes in response to comments received. Adding these wine treating materials and processes to the TTB regulations will increase the acceptability in export markets of wine produced using these materials and processes.