Mich. Comp. Laws § 290.302: Standards of quality and purity.

Sec. 2.

That when used in this chapter, the standards of quality and purity of gum spirits of turpentine, steam distilled wood turpentine, destructively distilled wood turpentine, gum rosin and wood rosin shall be those of the official naval stores standards of the United States, as set forth in the federal naval stores act or amendments thereto.