CFR > Title 27 - Alcohol, Tobacco Products and Firearms > CHAPTER I—ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY > SUBCHAPTER B—TOBACCO (parts 40 to 46) > PART 40—MANUFACTURE OF TOBACCO PRODUCTS, CIGARETTE PAPERS AND TUBES, AND PROCESSED TOBACCO > SUBPART K—Manufacture of Cigarette Papers and Tubes (§40.351 to §40.478) > 40.423—Opening.