For purposes of paragraph (1)(A), where a particular treatment has been used in customary commercial practice in the United States, it shall continue to be recognized as a proper cellar treatment in the absence of regulations prescribed by the Secretary finding such treatment not to be proper cellar treatment within the meaning of this subsection.
For purposes of this paragraph, the term “affiliate” has the meaning given such term by section 117(a)(4) of the Federal Alcohol Administration Act (27 U.S.C. 211(a)(4)) and includes a winery’s parent or subsidiary or any other entity in which the winery’s parent or subsidiary has an ownership interest.
The Secretary may by regulations prescribe limitations on the preparation and use of clarifying, stabilizing, preserving, fermenting, and corrective methods or materials, to the extent that such preparation or use is not acceptable in good commercial practice.