49 CFR § 1540.107 - Submission to screening and inspection.
(a) No individual may enter a sterile area or board an aircraft without submitting to the screening and inspection of his or her person and accessible property in accordance with the procedures being applied to control access to that area or aircraft under this subchapter.
(b) An individual must provide his or her full name, as defined in § 1560.3 of this chapter, date of birth, and gender when -
(1) The individual, or a person on the individual's behalf, makes a reservation for a covered flight, as defined in § 1560.3 of this chapter, or
(2) The individual makes a request for authorization to enter a sterile area.
(c) An individual may not enter a sterile area or board an aircraft if the individual does not present a verifying identity document as defined in § 1560.3 of this chapter, when requested for purposes of watch list matching under § 1560.105(c), unless otherwise authorized by TSA on a case-by-case basis.
(d) The screening and inspection described in paragraph (a) of this section may include the use of advanced imaging technology. Advanced imaging technology used for the screening of passengers under this section must be equipped with and employ automatic target recognition software and any other requirement TSA deems necessary to address privacy considerations.
(1) For purposes of this section, advanced imaging technology-
(i) Means a device used in the screening of passengers that creates a visual image of an individual showing the surface of the skin and revealing other objects on the body; and
(ii) May include devices using backscatter x-rays or millimeter waves and devices referred to as whole body imaging technology or body scanning machines.
(2) For purposes of this section, automatic target recognition software means software installed on an advanced imaging technology device that produces a generic image of the individual being screened that is the same as the images produced for all other screened individuals.