Following the "Costa Concordia" casualty in January 2012, what interim safety measure regarding passenger musters was recommended by the IMO Maritime Safety Committee (MSC)?

MCA Oral Exam Questions

On a ship engaged on a voyage where passengers are scheduled to be on board for more than 24 hours, it is recommended that the muster of newly-embarked passengers should take place prior to the departure at every port of embarkation.

 In cases where new passengers arrive after the above muster has been completed, they should be promptly provided with individual or group safety briefings. (MSC. 1/Circ. 1446) An amendment to SOLAS which would make this recommendation mandatory is expected to be adopted by the Maritime Safety Committee in June 2013 and to enter into force in 2014.