The Government says the Unite union is refusing to provide a truly secret ballot of bus drivers.
The men are back at work after their 12 days of action over TT.
The Government ran emergency services during that time.
Leisure Minister, Graham Cregeen, claims that a truly confidential ballot now needs to take place.
Steam Packet wanted to be 'certain' before issuing statement, says MD
Manxman to be out of service until late September
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Manxman won't return to service until end of September
Steam Packet says the situation is hugely disappointing