The county commission or like governing body of Tuscaloosa county shall have the power to levy and collect a special property tax, in addition to all other taxes, now or hereafter authorized by the Constitution and laws of Alabama, of not exceeding 10 mills on each dollar's worth of taxable property in the county as assessed for state taxation during the preceding year, the proceeds of which shall be used exclusively for developing parks and multi-recreation areas and facilities, and for other recreational purposes; provided that such tax and the purpose or purposes thereof, and the time such tax is proposed to be continued shall have been first submitted to the vote of the qualified electors of the county and voted for by a majority of those voting at such election. Such governing body may also become indebted, and in evidence of such indebtedness issue and sell interest bearing bonds in an amount not to exceed $20,000,000.00 in principal amount, provided that before the issuance of such bonds the question of whether such bonds shall be issued shall have first been submitted to and approved by the qualified electors of Tuscaloosa county at an election. Both the question of levying the tax and the issuing and selling of bonds may be submitted at the same election; or either question may be submitted at a separate election. Either the tax may be levied but no bonds issued, or bonds may be issued and no tax levied hereunder, if other funds are available for the payment of the bonds. The proceeds from taxes levied under authority of this amendment and of all bonds issued hereunder shall be used for developing parks and multi-recreation areas and facilities and for other recreational purposes and all or any part thereof may be appropriated to any county park and recreation authority duly organized and existing pursuant to law in such county and by such authority used for the above-named purposes. The elections provided for herein shall be called, held, conducted and canvassed, and may be contested, in the manner provided by law for the calling, holding, conducting, canvassing and contesting of county bond elections, and if the levy of the tax or the issuance of said bonds shall be authorized at any such elections, the tax may be levied and bonds may be sold and issued from time to time in the manner provided by law for the authorization and sale of county bonds. In the event the voters of Tuscaloosa county do not authorize the levy of the tax or the issuance and sale of said bonds at any election called hereunder then other elections may be called by the governing body of Tuscaloosa county from time to time until the voters of Tuscaloosa county do authorize the levy of the tax or the issuance and sale of said bonds; provided that no two elections shall be held within one year of each other. The indebtedness herein authorized shall be in addition to all other indebtedness authorized prior to the adoption of this amendment.