Pub. L. 109-280, tit. XIV, subtit. A, ch. 1, sec. 1445
2-ACETYLBUTYROLACTONE.
SEC. 1445. 2-ACETYLBUTYROLACTONE. Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: “9902.10.652-Acetylbutyrolactone (CAS No. 517–23–7) (provided for in subheading 2932.29.50)FreeNo changeNo changeOn or before 12/31/2009”.