Miss. Code § 41-55-49
The board of supervisors of each county becoming a member of an air ambulance service district shall annually, on or before March 15 of each year beginning with the calendar year in which the district is created, pay or cause to be paid to the depository of the district the total avails from the tax levied on all of the taxable property within the county for the purpose of supporting the district. Such payments shall be made and continued as long as the district remains in existence, there is need therefor and the county remains a part thereof. The board of supervisors of each county shall annually provide the district the total avails from the tax levied on all taxable property within the county for such purpose; in lieu of a tax levy the board of supervisors may appropriate an equivalent sum from the general fund or other available funds of the county.
Any municipality or county which is within the territorial limits of the district may advance funds to the district to pay the preliminary expenses of the district, including reports, organization or administration expenses, on such terms of repayment as the governing body of such municipality or county shall determine.
Miss. Code § 41-55-49