The Scottish Government needs to get the single police force "back on track" ahead of its launch next month, according to the Liberal Democrats.
A power struggle between the Chief Constable and the force's civilian oversight Scottish Police Authority (SPA) body has yet to be resolved, justice spokeswoman Alison McInnes will tell MSPs.
"The SNP Government needs to act now to make sure the single police force gets back on track ahead of its official launch next month," she said.
"The power struggle with the SPA has been allowed to drag on for months with staff none the wiser over who will ultimately have responsibility for human resources or finances.
"This cannot continue to be played out in the newspapers. It isn't fair on police staff and it isn't fair on local communities concerned about the impact of these changes on local policing.
"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.