19 CFR 10.131 : Customs Duties (§ 0.1 To Parts 400-599) — (§ 0.1 To Parts 135-140) — U.S. Customs And Border Protection, Department Of Homeland Security; Department Of The Treasury (§ 0.1 To Parts 135-140) — Articles Conditionally Free, Subject To A Reduced Rate, Etc. (§ 10.1 To § 10.3034) — General Provisions (§ 10.1 To § 10.183) — Rate Of Duty Dependent Upon Actual Use (§ 10.131 To § 10.139) — Circumstances in which applicable.

The provisions of §§ 10.131 through 10.139 are applicable in those circumstances in which the rate of duty applicable to merchandise is dependent upon actual use, unless there is a specific provision in this part which governs the treatment of the merchandise. However, specific marking or certification requirements, such as those for bolting cloths in section 10.58, may be applicable to merchandise subject to the provisions of sections 10.131-10.139.