[3] President Ronald Reagan issued Executive Order 12333 titled United States Intelligence Activities in 1984.
This order defined covert action as "special activities", both political and military, that the US Government could legally deny.
[3][4] The CIA must have a "Presidential Finding" issued by the President in order to conduct these activities under the Hughes-Ryan amendment to the 1991 Intelligence Authorization Act.
According to a 2018 study by University of Chicago political scientist Austin Carson, covert operations may have the beneficial effect of preventing escalation of disputes into full-blown wars.
[8] To go "undercover" (that is, to go on an undercover operation) is to avoid detection by the object of one's observation, and especially to disguise one's own identity (or use an assumed identity) for the purposes of gaining the trust of an individual or organization in order to learn or confirm confidential information, or to gain the trust of targeted individuals to gather information or evidence.
[9] For example, in the United States, some activities by military and intelligence agencies are funded by a classified "black budget", of which the details, and sometimes even the total, are hidden from the public and from most congressional oversight.
[12] Such operations have been carried out by the FBI,[13] CIA,[14] NSA, KGB, Stasi, Mossad, MI6, MI5, ASIS, COMANF, DGSE, AISE, CNI, MSS, VAJA, R&AW, UDU, SVR, FSB, GRU, ISI, BND, BIN and the intelligence services of other states.
From the start, the force occasionally employed plainclothes undercover detectives, but there was much public anxiety that its powers were being used for the purpose of political repression.
In part due to these concerns, the 1845 official Police Orders required all undercover operations to be specifically authorized by the superintendent.
Its name was changed to Special Branch as it had its remit gradually expanded to incorporate a general role in counter terrorism, combating foreign subversion and infiltrating organized crime.
Joh defined the term authorized criminality to describe this phenomenon, which she restricts primarily to undercover law enforcement officers, excluding confidential informants.
[23] These criminal activities are primarily used to "provide opportunities for the suspect to engage in the target crime" and to maintain or bolster their cover identity.
The lack of the usual controls of a uniform, badge, constant supervision, a fixed place of work, or (often) a set assignment could, combined with their continual contact with the organized crime, increase the likelihood for corruption.
[29] Police, in general, have very high alcoholism rates compared to most occupational groups, and stress is cited as a likely factor.
[28] The lifestyle led by undercover agents is very different compared to other areas in law enforcement, and it can be quite difficult to reintegrate back into normal duties.
Agents work their own hours, they are removed from direct supervisory monitoring, and they can ignore the dress and etiquette rules.