What were the main changes introduced by IHR (2005) concerning ships and shipmasters?

(1) Deratting Certificates and Deratting Exemption Certificates were replaced by Ship Sanitation Control Certificates and Ship Sanitation Control Exemption Certificates (which cover all aspects of shipboard sanitation, not just rodents).(2) the Maritime Declaration of Health was updated to reflect the broader scope of IHR (2005) and now contains nine health questions instead of the previous six.