Any person or persons, vessel, firm or corporation, acting as or employing a harbormaster, pilot, boatman, stevedore, surveyor, watchman, police, ship agent, ship chandler or such other persons as may be required by the port commissioners, performing services for the public shipping, without first being duly licensed and qualified as provided in this chapter shall be guilty of a misdemeanor and, upon conviction, shall pay a fine of not exceeding one thousand dollars ($1,000.00) per day for each day while so acting, and serve not more than thirty (30) days in jail, or both in the discretion of the court; and it shall be unlawful and a misdemeanor for any person not licensed by the board of commissioners to interfere with the duties of the harbormaster, pilot, boatmen, stevedores or their employees, surveyors, watchmen, police, ship agents, ship chandlers or such other persons who have been duly licensed while performing services for the public shipping except in cases of distress; and any person or persons violating the provisions hereof in that regard, on conviction, in the city, county or state court, shall be fined not less than one hundred dollars ($100.00) or sentenced to thirty (30) days in jail, or both, and not more than one thousand dollars ($1,000.00) or six (6) months in jail, or both, for each offense at the discretion of the court trying the case.