Ala. Code § 41-14-31
As much money as may be needed for current operational purposes of the state government, as determined by the State Treasurer in accordance with procedures prescribed by Section 41-14-32 and with the approval of the Governor, shall be maintained at all times in the State Treasury in cash or in demand deposits with state depositary banks.
The State Treasurer shall apportion such demand deposits among state depositaries, giving preference to banks that are located in Alabama and giving due consideration to the activities of the various banking accounts maintained therein, the reasonable value of the banking services rendered or to be rendered the state by depositary banks, and giving first priority to the value and importance of such deposits to the economy of the communities and the various areas of the state to be affected thereby, as indicated by the loan to deposit ratio.
Ala. Code § 41-14-31 (1975)