The right to receive the whole or any portion of the taxes may be assigned and transferred by the railway company or corporation, water transportation lines, water works, electrical lines, power plants and motor bus lines for the carrying of passengers, to any person, partnership or other company or corporation; and the person, partnership or other company or corporation shall have the same right to enforce the collection and payment of the taxes, as the railway company or corporation, water transportation lines, water works, electrical lines, power plants and motor bus lines for the carrying of passengers would have had if the assignment had not been made.  No tax shall be paid by the parish, city or incorporated town until the railway company or corporation, water transportation lines, water works, electrical lines, power plants and motor bus lines for the carrying of passengers, in favor of which the tax has been voted is completed and in operation, to the point in the parish, city or incorporated town as may be specified in the ordinance.