(a) As used in this article:

(i) 'Appropriation' means an allocation of money to be expended for a specific purpose;

(ii) 'Budget' means a plan of financial operations for a fiscal year embodying estimates of all proposed expenditures, the proposed means of financing them and what the work or service is to accomplish;

(iii) 'Budget year' means the fiscal year or years for which a budget is prepared;

(iv) 'Department' means the state department of audit;

(v) 'Estimated revenue' means the amount of revenues estimated to be received during the budget year in each fund;

(vi) 'Fiscal year' means the annual period for recording fiscal operations beginning July 1 and ending June 30;

(vii) 'Fund balance' means the excess of the assets over liabilities, reserves and contributions, as reflected by an entity's books of account;

(viii) 'Proposed budget' means the budget presented for public hearing as required by W.S. 16-12-406 and formatted as required by W.S. 9-1-507(a)(viii) and 16-12-403;

(ix) 'Unappropriated surplus' means the portion of the fund balance of a budgetary fund which has not been appropriated or reserved in an ensuing budget year.