5. An inquiry under the 2016 Act is to be held into a death occurring before 15th June 2017 where—
(a)section 1(1)(a) or (b) or 1A(1) of the 1976 Act applies to the death; and
(b)no inquiry has been applied for under section 1(1) or 1A(4)(b) of the 1976 Act.