Page 6, strike lines 3 through 15 and insert the following:

(b) Exception for Government National Security and Law Enforcement Purposes. - The prohibition contained in subsection (a) shall not apply to any department, agency, or instrumentality of the United States, or to any department, agency, or political subdivision of a State that has a valid contract with a nongovernmental entity that is assisting in the performance of national security or law enforcement activity.