关于2013年“乙肝疫苗婴儿死亡”事件，以下正确的说法是()

A．A conditional or partial exemption may be granted, in exceptional circumstances, for a single voyage outside the sea area for which the vessel is equipped.
B．Ships must have the required equipment inspected at least once every 12 months.
C．Ships must carry at least three persons holding GMDSS operator's license for distress and safety radio communications purposes.
D．The regulations apply to all passenger ships gross tonnage and more regardless of size and cargo ships of 300.