Investigatory Powers Act 2016 (c. 25)
Part 3 — Authorisations for obtaining communications data
(ii)
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to disclose the data (whether already in the operator’s
possession or subsequently obtained by the operator) to a
person identified by, or in accordance with, the authorisation.
(5)
An authorisation—
(a) may relate to data whether or not in existence at the time of the
authorisation,
(b) may authorise the obtaining or disclosure of data by a person who is
not an authorised officer, or any other conduct by such a person, which
enables or facilitates the obtaining of the communications data
concerned, and
(c) may, in particular, require a telecommunications operator who controls
or provides a telecommunication system to obtain or disclose data
relating to the use of a telecommunications service provided by another
telecommunications operator in relation to that system.
(6)
An authorisation—
(a) may not authorise any conduct consisting in the interception of
communications in the course of their transmission by means of a
telecommunication system, and
(b) may not authorise an authorised officer to ask or require, in the
circumstances mentioned in subsection (4)(b) or (c), a person to disclose
the data to any person other than—
(i) an authorised officer, or
(ii) an officer of the same relevant public authority as an authorised
officer.
(7)
It is necessary to obtain communications data for a purpose falling within this
subsection if it is necessary to obtain the data—
(a) in the interests of national security,
(b) for the purpose of preventing or detecting crime or of preventing
disorder,
(c) in the interests of the economic well-being of the United Kingdom so
far as those interests are also relevant to the interests of national
security,
(d) in the interests of public safety,
(e) for the purpose of protecting public health,
(f) for the purpose of assessing or collecting any tax, duty, levy or other
imposition, contribution or charge payable to a government
department,
(g) for the purpose of preventing death or injury or any damage to a
person’s physical or mental health, or of mitigating any injury or
damage to a person’s physical or mental health,
(h) to assist investigations into alleged miscarriages of justice,
(i) where a person (“P”) has died or is unable to identify themselves
because of a physical or mental condition—
(i) to assist in identifying P, or
(ii) to obtain information about P’s next of kin or other persons
connected with P or about the reason for P’s death or condition,
or
(j) for the purpose of exercising functions relating to—
(i) the regulation of financial services and markets, or
(ii) financial stability.