A Practice Note describing early disposition (100-day) proceedings in US International Trade Commission (ITC) investigations under Section 337 of the Tariff Act (19 U.S.C. § 1337) and ITC Rule 210.10(b)(3) (19 C.F.R. § 210.10(b)(3)). This Note outlines the legal framework for these expedited proceedings, identifies the types of issues that can qualify for expedition, and discusses the 100-day proceeding's potential advantages and disadvantages. It also provides an overview of the proceeding from preliminary steps through administrative and judicial review.