This document revises the title and structure of title 19 of the Code of Federal Regulations (CFR) to reflect changes caused by the creation of the Department of Homeland Security and the consequent governmental reorganization. The document also specifies the signatures that indicate the exercise of authority for documents that appear in 19 CFR chapter I. In addition, this document adds and reserves for future use a chapter under which the bureau of Immigration and Customs Enforcement (ICE) may issue regulations.