The total amount which may be expended in any fiscal year by the state department for each of the objects and purposes provided by this title shall in no event exceed the amount appropriated in the general appropriation bill for each such object or purpose and any monies granted by the federal government for such object or purpose, together with additional amounts appropriated therefor by any special legislative appropriation bill. If at the end of a fiscal year there is an unencumbered balance of the appropriation for such fiscal year made to the state department for any such object or purpose, the balance shall be deemed to consist exclusively of such monies.
A.R.S. § 46-138