Section 37131 Of Article 2. Butter Grades From California Food And Agricultural Code >> Division 15. >> Part 3. >> Chapter 3. >> Article 2.

. All butter which is sold or distributed in package form, including such butter which is received from out-of-state points, shall be classified into grades which indicate its quality and shall be labeled and advertised by the use of one of the following designations:
  (a) First quality.
  (b) Second quality.