"The government ministers who were so keen to scrap our successful local forces are now nowhere to be seen on the problems caused by their legislation. With ministers holding all the cards on the SPA, they cannot afford to keep quiet.
"I'm concerned that the ongoing battle of wills is going to hinder the new police force in carrying out its duties. Scottish Liberal Democrats are asking the Scottish Government to review whether the legislation could be amended now to ensure success for the new single force."
Chief Constable Stephen House and SPA chairman Vic Emery had been at loggerheads over who will control police staff.
Both men sought legal advice under the terms of legislation which will merge the existing eight regional forces by April.
A recent meeting of the SPA in Edinburgh heard that Police Scotland and the SPA have decided to share responsibility for police staff, with staff being assigned to either body based on need.