# Regulation of Investigatory Powers Act 2000, Paragraph 7


(1) A permission granted by any person under any provision of this Schedule shall not entitle any person to give a section 49 notice at any time after the permission has ceased to have effect.
(2) Such a permission, once granted, shall continue to have effect (notwithstanding the cancellation, expiry or other discharge of any warrant or authorisation in which it is contained or to which it relates) until such time (if any) as it—
(a) expires in accordance with any limitation on its duration that was contained in its terms; or
(b) is withdrawn by the person who granted it or by a person holding any office or other position that would have entitled him to grant it.

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Source: https://www.legislation.gov.uk/ukpga/2000/23/schedule/2/paragraph/7 (the official version)
Page: https://openlegislation.uk/regulation-of-investigatory-powers-act-2000/schedule-2/paragraph-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.