157.Subsection (4)inserts definitions of “act of terrorism”, “terrorism”, and “terrorist investigation”, into section 70 of the SOCAP for the purpose of the disclosure notice provisions. The first two of these terms are defined by reference to the TACT. The definition of terrorism and act of terrorism are discussed at paragraphs 16-19 of these explanatory notes. The definition of terrorist investigation is set out in section 60(7) of the SOCAP (as inserted by subsection (2) of this section). The definition covers the investigation of the commission, preparation or instigation of acts of terrorism, the investigation of acts or omissions that appear to be carried out for the purposes of terrorism and which consist of the commission, preparation or instigation of an offence and the investigation of an offence under the TACT or Part 1 of this Act (except an offence under section 1 (encouragement of terrorism) or section 2 (dissemination of terrorist publications)).