Pub. L. 111-227, tit. I, sec. 1207
PERFLUOROBUTANESULFONYL FLUORIDE.
SEC. 1207. PERFLUOROBUTANESULFONYL FLUORIDE. Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: “9902.40.92Perfluorobutanesulfonyl fluoride (CAS No. 375–72–4) (provided for in subheading 2904.10.50 or 2904.90.50)FreeNo changeNo changeOn or before 12/31/2012”.