With a month to go before the current labor contract expires, negotiators for the American Federation of State, County and Municipal Employees Council 13 announced on Friday they have reached a tentative agreement with Gov. Tom Wolf’s administration on a new four-year contract.

AFSCME Council 13 represents 41,000 state government employees and is the largest of the state government labor unions.

Details of the agreement are being withheld until all members are notified and put to a ratification vote, said union spokesman Jennifer George. The voting will take place over the next several weeks but is expected to be completed within the next month.

Council 13’s rank-and-file negotiators have spent the last few months in discussions with the administration about a successor contract to the one that expires June 30. Its state policy committee approved the tentative agreement on Thursday, George said.

“We have negotiated what I believe is a fair deal for commonwealth employees, as well as for taxpayers, especially considering the exceptional services commonwealth employees provide to Pennsylvanians every single day,” Council 13 executive director David Fillman said.

The tentative agreement requires a cost analysis by the state’s Independent Fiscal Office before the administration can sign off per a 2016 law. That analysis will look at the annual cost of changes in salaries, benefits, paid leave and working conditions over the contract’s life.

An attempt to get a comment from the Wolf Administration was not immediately successful.

The union’s current three-year pact included raises that when compounded over the life of the contract amounted to 12.3 percent. The Independent Fiscal Office put the price tag of that contract at $390.3 million over the three-year term. Healthcare changes that increased the employee contribution rate were estimated to results in a $13.6 million savings over the contract’s life.