On 21 April 2017 Norway became the first state to deposit its instrument of ratification to the Protocol of 2010 to the International Convention on Liability and Compensation for Damage in Connection with the Carriage of Hazardous and Noxious Substances by Sea. There are currently seven other signatories, subject to ratification.
For further information, and requirements for entry into force, see here. A consolidated version of the treaty (2010 HNS Convention) is available here.
De Maribus 