Any person who engages in the business of plumbing as a journeyman plumber, plumbing contractor or self-employing plumber in the city without having obtained a license from the state of Illinois as provided in this chapter and/or any such person who shall not be registered as provided in this chapter shall, upon conviction thereof, be fined as provided in section 1-4-1 of this code for each time that he so engages in the business of plumbing in violation of this chapter. (1977 Code § 15.32.100; amd. 2013 Code)