P.L. 71–10, Approved June 15, 1929 (46 Stat. 11)

Sec. 15. [12 U.S.C. 1141j] 

(g)  “Agricultural commodity” defined. As used in this Act, the term “agricultural commodity” includes, in addition to other agricultural commodities, crude gum (oleoresin) from a living tree, and the following products as processed by the original producer of the crude gum (oleoresin) from which derived: Gum spirits of turpentine and gum rosin, as defined in the Naval Stores Act, approved March 3, 1923.