For the purposes of this Chapter, “the responsible officer”, in relation to an offender to whom a youth rehabilitation order relates, means the person identified in subsection ... (3) or (4).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If the only youth rehabilitation requirement imposed by the order is an attendance centre requirement, the responsible officer is the officer in charge of the attendance centre specified in the order.
In any other case the responsible officer is the qualifying officer who, as respects the offender, is for the time being responsible for discharging the functions conferred by this Chapter on the responsible officer.
In subsection (4) “qualifying officer”, means—