The Scientific Council strives to achieve consensus on all its advice, and with very few exceptions since the creation of the Scientific Council in the late 1970s, that has been achieved. In the rare instance when the Scientific Council has not been able to achieve consensus, it still produces its report, plus it includes any minority views of other contracting parties that disagree. The Scientific Council chair would then present the report of the Scientific Council and note that there was also a minority position. It still produces its report with I guess you would consider it the majority view and any minority reviews.
As I say, I can remember one instance in approximately 25 to 30 years when that has occurred. It's an extremely rare occurrence for the Scientific Council not to be able to achieve its goals by consensus.