49 CFR 109.5 - Opening of packages.
(a) When an agent has an objectively reasonable and articulable belief that a package offered for or in transportation in commerce may contain a hazardous material and that such a package does not otherwise comply with this chapter, the agent may—
(1) Stop movement of the package in transportation and gather information from any person to learn the nature and contents of the package;
Title 49 published on 2014-10-01
no entries appear in the Federal Register after this date.