Concealed Monitoring Where the Subject has a Reasonable Expectation of Privacy
Department of Defense Regulation 5240.1-R, Procedures Governing the Activities of DOD Intelligence Components that Affect U.S. Persons, § C6.2.3 (Dec. 1982): Concealed Monitoring where the subject has a reasonable expectation of privacy
Whether concealed monitoring is to occur where the subject has a reasonable expectation of privacy is a determination that depends upon the circumstances of a particular case, and shall be made only after consultation with the legal office responsible for advising the DoD intelligence component concerned. Reasonable expectation of privacy is the extent to which a reasonable person in the particular circumstances involved is entitled to believe his or her actions are not subject to monitoring by electronic, optical, or mechanical devices. For example, there are ordinarily reasonable expectations of privacy in work spaces if a person's actions and papers are not subject to ready observation by others under normal working conditions. Conversely, a person walking out of his or her residence into a public street ordinarily would not have a reasonable expectation that he or she is not being observed or even photographed; however, such a person ordinarily would have an expectation of privacy within his or her residence.