Should the vessel be seized or detained by any authority or arrested at the suit of any party having or purporting to have a claim against any interest in the vessel, hire shall not be payable in respect of any period during which the vessel is not fully at Charterers’ use and all extra proven direct expenses shall be for Owners’ account, unless such seizure or detention is occasioned by any personal act or omission or default of the Charterers or their agents or their employees, or by reason of cargo carried.