A probation officer shall assess a child at a place of assessment or in a place that is conducive to privacy, before the child appears at the initial inquiry relating to that child when he or she is informed by a police officer of —
(a) the apprehension of the child under section 9(7);
(b) the service of a summons under section 21(3)(a); or
(c) the delivery of a written notice under section 22(3)(b).