Mont. Code Ann. § 53-6-151

There is a medicaid reserve account in the state special revenue fund provided for in 17-2-102. Money in the account must be used by the department for medicaid benefits after June 30, 2011. Any interest or income earned on the account must be deposited in the account. Each calendar quarter through December 31, 2010, the amount recovered under the federal medical assistance percentage hold harmless provision of the American Recovery and Reinvestment Act of 2009, Public Law 111-5, must be transferred to the medicaid reserve account.