In addition to and exclusive of any taxes which may be levied for the interest and sinking fund of any bonds, notes, or time warrants issued under authority of this chapter or any other act of the General Assembly authorizing municipalities to issue such bonds, notes, or warrants for airport purposes, the governing body of any municipality may levy and collect a special tax for the purpose of improving, operating, maintaining, and conducting an airport or air navigation facility, or for any other purpose falling within the purview of this chapter. However, the total of the special tax, together with all other taxes levied by the municipality, shall not exceed the limit placed on the municipal taxes by Arkansas Constitution, Article 14, § 4, nor exceed the limits of indebtedness placed upon municipalities by the constitution and laws of this state.