306Extended sentences: meaning of “specified offence” etc
(1)An offence is a “specified offence” for the purposes of this Code if it is—
(a)a specified violent offence,
(b)a specified sexual offence, or
(c)a specified terrorism offence.
(2)In this Part—
“serious harm” means death or serious personal injury, whether physical or psychological;
“specified violent offence” means an offence specified in Part 1 of Schedule 18;
“specified sexual offence” means an offence specified in Part 2 of that Schedule;
“specified terrorism offence” means an offence specified in Part 3 of that Schedule.