From the Portal:
Expiration of Leave Carryover Extension
Section 504 of the FY 2010 National Defense Authorization Act (NDAA) included a provision extending the maximum leave carryover of 75 days through 30 September 2013. The DoD Office of General Counsel has determined that members were authorized to carry forward up to 75 days from FY 2012 to FY 2013, but all leave in excess of 60 days as of 30 September 2013, will be lost on 1 October 2013 (FY 2014), barring any additional changes to the law or policy on the subject.
Members who carried forward a balance of 75 days on 1 October 2012, will be required to reduce their leave to a total of 60 days NLT 30 Sept 2013 in order to prevent loss of leave.
Office of the Under Secretary of Defense (OUSD) Personnel & Readiness (P&R) indicates it is pursuing a statutory extension to the maximum leave carryover, but it has not yet been passed.
For more information on leave carryover extension or any other personnel related issue, visit the myPers website.
Given that, I'd be on track to use 45 unless they do come back and pass something extending the date.