Poultry and poultry products shall be exempt from the provisions of the Federal Food, Drug, and Cosmetic Act [21 U.S.C. 301 et seq.] to the extent of the application or extension thereto of the provisions of this chapter, except that the provisions of this chapter shall not derogate from any authority conferred by the Federal Food, Drug, and Cosmetic Act prior to August 18, 1968.

The detainer authority conferred by section 467a of this title shall apply to any authorized representative of the Secretary of Health and Human Services for purposes of the enforcement of the Federal Food, Drug, and Cosmetic Act [21 U.S.C. 301 et seq.] with respect to any poultry carcass, or part or product thereof, that is outside any official establishment, and for such purposes the first reference to the Secretary in section 467a of this title shall be deemed to refer to the Secretary of Health and Human Services.