Part 5: Equipment interference Section 129: Safeguards relating to retention and disclosure of material
This section sets out that the issuing authority must ensure that arrangements are in force for securing that certain requirements are met relating to retention and disclosure of material obtained under the warrant. The number of persons who see the material, the extent of disclosure and the number of copies made of any material must be kept to the minimum necessary for the authorised purposes. Subsection (3) sets out the circumstances in which something is necessary for the authorised purposes, for example where it is necessary for the functions of the Secretary of State or a Judicial Commissioner under the Act.
	Subsections (4) to (6) require that material is kept in a secure manner and that it must be destroyed as soon as it is no longer required for any authorised purpose. Subsection (8) requires that the Investigatory Powers Commissioner must be informed where confidential journalistic material or material which identifies a source of journalistic material is retained for purposes other than destruction.
	The requirements in this section do not apply to material, or copies of material, handed over to an overseas authority. Section 130 applies instead.