The parochial, ward and municipal authorities of the state may order elections in their respective parishes, wards, or municipalities and may, when authorized by a vote of the majority of the property taxpayers in number and in value entitled to vote under the provisions of the constitution and laws of this state, levy special taxes in aid of public improvements or railway enterprises, water transportation lines, power plants and motor bus lines for the carrying of passengers.
La. R.S. § 39:781