In reaction to the Aldrich Ames espionage case, Congress gives agencies authority to issue NSLs to financial institutions, consumer credit agencies and travel agencies to obtain credit and financial information relating to federal employees with access to classified information in the context of an investigation of leaked information. The NSL statute contains gag order provisions, restrictions on dissemination, and a grant of immunity for institutions that comply with the NSL. See 50 U.S.C. § 436 (1994 ed.).