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

The vessel is carrying more than the required number of qualified GMDSS radio operators.

The vessel has a temporary waiver of its radio license and Safety Certificate.

The vessel is not capable of performing all required Distress and Safety functions.

The vessel is not carrying a GMDSS radio maintainer, but has provided for shoreside maintenance plus duplication of equipment if required.

What are the conditions, under GMDSS,...