Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) The Secretary may, by written notice given to the ship operator for a regulated Australian ship, establish one or more on - board security zones on the ship. Each on - board security zone must be of a type prescribed under section 111.
(2) The notice must identify the areas or parts of the ship to be covered by the on - board security zone or zones.
(3) The purpose of on - board security zones is to subject those zones to additional security requirements.