92.This section provides further detail regarding the directions that a constable can make under section 30. Subsection (1) sets out how a direction under subsection (4) of section 30 may be given, withdrawn or varied. Subsection (2) sets out the offence of knowingly contravening a direction and subsection (3) introduces a power of arrest. Subsection (4) ensures that where the power to take a young person under 16 home in subsection (6) of section 30 is exercised, the local authority should be notified.