Whether subsection (f) of the Stored Communications Act is unconstitutional

QUESTION PRESENTED Whether subsection (f) of the Stored Communications Act, 18 U.S.C. § 2703, which requires provider of wire or electronic communications to preserve user account information upon the request of a government agency pending the issuance of a warrant or other court process, is unconstitutional on its face because it allows law enforcement to conduct warrantless searches and seizures in the absence of any recognized exception to the warrant requirement of the Fourth Amendment. i