The board may transfer any unexpended and unencumbered appropriation or any portion thereof from one account to another within the same department or from one department to another within the same fund; except that no appropriation for debt service or other appropriation required by law may be reduced below the minimums required.
Whenever the necessity for maintaining any special fund of a district has ceased to exist and a balance remains in the fund, the board may authorize the transfer of the balance to the general fund. Applicable law shall govern the use or transfer of balance in any debt service or special revenue fund.
Okla. Stat. tit. 19, § 1720