To levy and collect taxes, as herein provided, the board shall, in each year, determine the amount of money necessary to be raised by taxation, taking into consideration other sources of revenue of the district, and shall fix a rate of levy, which when levied upon every dollar of assessed valuation of taxable property within the district, and with other revenues, will raise the amount required by the district annually to supply funds to pay for expenses of organization, purchase of necessary equipment, operation, maintenance and upkeep of the works and equipment of the district, provided, however, that said levy shall not exceed six hundredths percent (.06%) of market value for assessment purposes of all taxable property within the district for the purposes hereinbefore set forth, and provided further, that no levy shall be made in excess of four hundredths percent (.04%) of market value for assessment purposes for the purposes set forth in this section, unless the board of trustees of the district shall grant a public hearing, after notice of the time, place and purpose of said hearing has been published in a newspaper of general circulation in the district. Provided, that in the first year after organization, the board of a district may, for the purpose of organization, to finance general preliminary expenses of the district or for any other purpose of the hospital district law, and before making a tax levy, incur an indebtedness not exceeding in the aggregate a sum equal to three tenths percent (.3%) of market value for assessment purposes of all real and personal property within the district. To repay any such organizational indebtedness incurred, on or after March 21, 1985, the board shall have authority to levy and collect an additional tax not to exceed one tenth percent (.1%) of market value for assessment purposes of all taxable property within the district. Such additional levy shall not be used for any purpose other than repayment of the organizational indebtedness and interest thereon. Such additional levy may be imposed until the organizational indebtedness and interest thereon is paid in full.