Pub. L. 101-382, tit. III, subtit. B, pt. 2, sec. 484C
PARTS OF IONIZATION SMOKE DETECTORS.
SEC. 484C. PARTS OF IONIZATION SMOKE DETECTORS. Chapter 90 is amended by inserting in numerical sequence the following new subheading with the article description having the same degree of indentation as the article description in subheading 9022.90.60: “ 9022.90.70 Of smoke detectors, ionization type 2.7% Free (A, B, E, IL) 2.1% (CA) 35% ”