CFR > Title 19 - Customs Duties > CHAPTER I—U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY > PART 151—EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE > SUBPART C—Petroleum and Petroleum Products (§151.41 to §151.47) > 151.46—Allowance for detectable moisture and impurities.