In case any such bridge or the property of any telegraph, telephone, electric power and light companies, electric transmission lines, pipeline companies or express company shall have been subjected to taxation prior to the passage of this chapter, for any year for which it shall not have been assessed and paid taxes, or if any such property having been assessed, and from any irregularity in the assessment, or from any cause, the taxes thereon have not been paid, then a separate return for each year for which taxes have not been paid shall be made as required by the law governing the taxation of railroad property.