What are the conditions，under GMDSS，whereby a ship is NOT allowed to depart from any port? （）

A. The vessel is not capable of performing all required distress and safety functions
B. The vessel is carrying more than the required number of qualified GMDSS radio operators
C. The vessel has a temporary waiver of its radio license and Safety Certificate
D. The vessel is not carrying a GMDSS radio maintainer，but has provided for shoreside maintenance plus duplication of equipment if required