States or from a person or entity located in the United States. (d) Exclusive means related to fourth amendment-Protected information Title I and sections 303, 304, 702, 703, 704, and 705 of the Foreign Intelligence Surveillance Act of 1978 ( 50 U.S.C. 1801 et seq. , 1823, 1824, 1881a, 1881b, 1881c, 1881d) shall be the exclusive means by which any information, records, data, or tangible things are acquired for foreign intelligence purposes from a person or entity located in the United States if the compelled production of such information, records, data, or tangible things would require a warrant for law enforcement purposes. (e) Definition In this section, the term United States person has the meaning given that term in section 101 of the Foreign Intelligence Surveillance Act of 1978 ( 50 U.S.C. 1801 ). 6. Limit on civil immunity for providing information, facilities, or technical assistance to the Government absent a court order Section 2511(2)(a) of title 18, United States Code, is amended— (1) in subparagraph (ii), by striking clause (B) and inserting the following: (B) a certification in writing— (I) by a person specified in section 2518(7) or the Attorney General of the United States