Ships that comply with the Convention will receive and are duly required to carry an international ballast water management certificate.[13] To receive a certificate, a ship will have to supply the necessary documentation showing compliance with the Convention and a survey will be carried out on-board.[14] A survey may be carried out by a flag State, or by a Classification Society who have been authorised by a flag State.[15] The convention is monitored by Port State Control, who must assess the ballast water management plan and its operation on the ship.[16]