http://www.legislation.gov.uk/ukpga/2016/25/section/40/enactedInvestigatory Powers Act 2016enKing's Printer of Acts of Parliament2019-08-16 Part 2CHAPTER 1 40 1 For the purposes of this section a warrant is a “relevant mutual assistance warrant” if— a the warrant is for the purposes of a request for assistance made under an EU mutual assistance instrument or an international mutual assistance agreement by the competent authorities of a country or territory outside the United Kingdom, and b either— i it appears that the interception subject is outside the United Kingdom, or ii the interception authorised or required by the warrant is to take place in relation only to premises outside the United Kingdom. 2 The decision to issue a relevant mutual assistance warrant may be taken by a senior official designated by the Secretary of State for that purpose. 3 In such a case, the warrant must contain— a a statement that the warrant is issued for the purposes of a request for assistance made under an EU mutual assistance instrument or an international mutual assistance agreement (as the case may be) by the competent authorities of a country or territory outside the United Kingdom, and b whichever of the following statements is applicable— i a statement that the interception subject appears to be outside the United Kingdom; ii a statement that the interception authorised or required by the warrant is to take place in relation only to premises outside the United Kingdom. 4 A relevant mutual assistance warrant may be renewed by a senior official designated by the Secretary of State for that purpose; and references in section 33 to the appropriate person include, in the case of such a warrant, references to that senior official. 5 Where a senior official renews a relevant mutual assistance warrant in accordance with subsection (4), the instrument renewing the warrant must contain— a a statement that the renewal is for the purposes of a request for assistance made under an EU mutual assistance instrument or an international mutual assistance agreement (as the case may be) by the competent authorities of a country or territory outside the United Kingdom, and b whichever of the following statements is applicable— i a statement that the interception subject appears to be outside the United Kingdom; ii a statement that the interception authorised or required by the warrant is to take place in relation only to premises outside the United Kingdom. 6 Subsection (7) applies in a case where— a a relevant mutual assistance warrant— i was issued containing the statement set out in subsection (3)(b)(i), or ii has been renewed by an instrument containing the statement set out in subsection (5)(b)(i), and b the last renewal (if any) of the warrant was a renewal by a senior official in accordance with subsection (4). 7 If the Secretary of State, or a senior official acting on behalf of the Secretary of State, believes that the person, group or organisation named or described in the warrant as the interception subject is in the United Kingdom, that person must cancel the warrant under section 39. 8 In this section— “the interception subject”, in relation to a warrant, means the person, group of persons or organisation to which the warrant relates; “senior official” means a member of the Senior Civil Service or a member of the Senior Management Structure of Her Majesty’s Diplomatic Service.