The Singapore Maritime and Port Authority (MPA) issued a Circular stating that, effective immediately, vessels of 300 GT or more and tugs engaged in towing or pushing if the combined GT of the tug and tow is 300 GT or more and any vessel carrying more than 12 passengers must submit a Notification of Arrival at least 12 hours prior to arrival. Vessels carrying hazardous and noxious substances in bulk must submit the Notification at least 24 hours prior to arrival. Upon arrival, all such vessels must submit a Confirmation of Arrival. Port Marine Circular No. 9 of 2004 (HK Law).