3. The following provisions in Part 2 of the 2016 Act (lawful interception of communications) come into force on 31st May 2018—
(a)section 15 (warrants that may be issued under this Chapter) so far as not already in force;
(b)section 16 (obtaining secondary data) so far as not already in force;
(c)section 17 (subject matter of warrants);
(d)section 18(1)(a) and (g), (2) and (3) (persons who may apply for issue of a warrant);
(e)in section 19 (power of Secretary of State to issue warrants)—
(i)subsections (1) to (3) for the purpose of the Secretary of State deciding to issue a warrant but not for the purpose of the issuing of a warrant;
(ii)subsections (4) and (5);
(f)section 20 (grounds on which warrants may be issued by the Secretary of State);
(g)in section 21 (power of Scottish Ministers to issue warrants)—
(i)subsections (1) to (3) for the purpose of the Scottish Ministers deciding to issue a warrant but not for the purpose of the issuing of a warrant, and
(ii)subsections (4) to (6);
(h)section 22 (“relevant Scottish applications”);
(i)section 23 (approval of warrants by Judicial Commissioners);
(j)section 26 (Members of Parliament etc.);
(k)section 27 (items subject to legal privilege);
(l)section 28 (confidential journalistic material);
(m)section 29 (sources of journalistic information);
(n)section 30 (decisions to issue warrants to be taken personally by Ministers);
(o)section 31 (requirements that must be met by warrants);
(p)section 40(1) to (3) and (8) (special rules for certain mutual assistance warrants);
(q)section 53 (safeguards relating to retention and disclosure of material);
(r)section 54 (safeguards relating to disclosure of material overseas);
(s)section 60 (Part 2: interpretation) so far as not already in force.