If you are going to post the FISA act you should probably post a bit more instead of picking the parts that fit your assertions. You have included this part;
1-101. Pursuant to Section 102(a)(1) of the Foreign Intelligence Surveillance Act of 1978 (50 U.S.C. 1802(a)), the Attorney General is authorized to approve electronic surveillance to acquire foreign intelligence information without a court order, but only if the Attorney General makes the certifications required by that Section.
But you conveniently left out the following details;
Emergency situations are addressed in 50 U.S.C. § 1805(f).39 Notwithstanding
other provisions of this subchapter, if the Attorney General reasonably determines
that an emergency situation exists with respect to the employment of electronic
surveillance to obtain foreign intelligence information before an order authorizing
such surveillance can with due diligence be obtained and that the factual basis for
issuance of an order under this subchapter to approve such surveillance exists, he
may authorize electronic surveillance if specified steps are taken. At the time of the
Attorney General’s emergency authorization, he or his designee must inform an FISC
judge that the decision to employ emergency electronic surveillance has been made.
An application for a court order under Section 1804 must be made to that judge as
soon as practicable, but not more than 72 hours after the Attorney General authorizes
such surveillance. If the Attorney General authorizes emergency electronic
surveillance, he must require compliance with the minimization procedures required
for the issuance of a judicial order under this subchapter. Absent a judicial order
approving the emergency electronic surveillance, the surveillance must terminate
when the information sought is obtained, when the application for the order is denied,
or after 72 hours from the time of the Attorney General’s authorization, whichever
is earliest.40 If no judicial order approving the surveillance is issued, the information
garnered may not be received in evidence or otherwise disclosed in any court.
Basically they are only authorized to perform these acts without a warrant for 72 hours.
