From and after the passage of this act, it shall not be lawful for any person to remove the contents of any privy-well within the limits of said cities, unless such person shall first be licensed by the bureau of health to do so, and any person offending against the provisions of this section shall for every such offense forfeit and pay a fine or penalty not exceeding fifty dollars. Any person desirous of being licensed to empty or remove the contents of privy-wells or cesspools shall make application in writing to the said bureau of health, and on being satisfied with the character of the applicant, and the construction of his vehicles, the said bureau may, under the rules and regulations made in relation thereto, and with the approval of the director of the department of public safety, grant him a license for one year, and may renew and continue the same from year to year, as shall be found proper.