The conviction of any person for engaging in business without obtaining a registration certificate, or for failure to pay any tax due under or otherwise comply with the provisions of this article or Article 1.5, shall not relieve the person from the obligation to pay any taxes that he may owe the City, nor shall the payment of any taxes owed prevent a prosecution under appropriate provisions of the Municipal Code for any violation of the provisions of this article or Article 1.5. The remedies provided in this Code are cumulative. The use of one or more of the remedies prescribed in this article shall not bar the use of any other remedy provided for the enforcement of the provisions of this article or Article 1.5.