7 C.F.R. § 1001.12
(a) Except as provided in paragraph (b) of this section, producer means any person who produces milk approved by a duly constituted regulatory agency for fluid consumption as Grade A milk and whose milk (or components of milk) is:
(b) Producer shall not include a dairy farmer described in paragraphs (b)(1) through (6) of this section. A dairy farmer described in paragraphs (b)(5) or (6) of this section shall be known as a dairy farmer for other markets.